<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-K


[X]  Annual report pursuant to Section 13 or 15(d) of the Securities
     Exchange Act of 1934 For the fiscal year ended June 27, 1999.

[ ]  Transition report pursuant to Section 13 or 15(d) of the Securities
     Exchange Act of 1934

                         Commission File Number 0-25150

                          STRATTEC SECURITY CORPORATION
                          -----------------------------
             (Exact name of registrant as specified in its charter)

          WISCONSIN                              39-1804239
          ---------                              ----------
    (State of Incorporation)         (I.R.S. Employer Identification No.)

                  3333 WEST GOOD HOPE ROAD, MILWAUKEE, WI 53209
                  ---------------------------------------------
                    (Address of principal executive offices)

                                 (414) 247-3333
                                 --------------
              (Registrant's telephone number, including area code)

           Securities registered pursuant to Section 12(b) of the Act:
    Title of each class                   Name of exchange on which registered
    -------------------                   ------------------------------------
           N/A                                            N/A

           Securities registered pursuant to Section 12(g) of the Act:
                          Common Stock, $.01 par value
                          ----------------------------
                                (Title of Class)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days. [x] Yes [ ] No

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of the registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment of this Form 10-K. [ ]

The aggregate market value of the voting Common Stock held by non-affiliates of
the registrant as of August 18, 1999 was approximately $192,310,000 (based upon
the last reported sale price of the Common Stock at August 18, 1999 on the
NASDAQ National Market). On August 18, 1999, there were outstanding 5,443,450
shares of $.01 par value Common Stock.

                       Documents Incorporated by Reference

<TABLE>
<CAPTION>
                                                                 Part of the Form 10-K
         Document                                                into which incorporated
         --------                                                -----------------------
<S>                                                              <C>
Portions of the Annual Report to Shareholders for the
fiscal year ended June 27, 1999.                                          I, II, IV

Portions of the Proxy Statement dated September 21, 1999, for the
Annual Meeting of Shareholders to be held on October 26, 1999.               III
</TABLE>


<PAGE>   2


                                     PART I

ITEM 1.  BUSINESS

         The information set forth under "Company Description" which appears on
pages 4 through 8 of the Company's 1999 Annual Report to Shareholders is
incorporated herein by reference. For information as to export sales, see the
information set forth under "Export Sales" included on page 21 of the Company's
1999 Annual Report to Shareholders, which is incorporated herein by reference.

EMERGING TECHNOLOGIES

         New electronic technologies are expected to become increasingly
important in future product designs. These technologies may include radio
frequency transmission and receiving, Hall effects sensing, optical reading and
sensing, and custom integrated circuit technology. Further advancements with
respect to RFID applications such as encrypted signals and rolling codes are
anticipated. Specific applications of certain of these technologies began in
prior model years. Application will occur in both OEM and aftermarket products.
In connection with the development of these technologies, the Company intends to
utilize strategic alliances and/or strategic sourcing with respect to certain
components in order to remain competitive from both a cost and quality
standpoint.

SOURCES AND AVAILABILITY OF RAW MATERIALS

         The primary raw materials used by the Company are high-grade zinc and
brass. These materials are generally available from a number of suppliers, but
the Company has chosen to concentrate its sourcing with one primary vendor for
each commodity. The Company believes its sources for raw materials are very
reliable and adequate for its needs. The Company has not experienced any
significant long term supply problems in its operations and does not anticipate
any significant supply problems in the foreseeable future.

PATENTS, TRADEMARKS AND OTHER INTELLECTUAL PROPERTY

         The Company believes that the success of its business will not only
result from the technical competence, creativity and marketing abilities of its
employees but also from the protection of its intellectual property through
patents, trademarks and copyrights. As part of its ongoing research, development
and manufacturing activities, the Company has a policy of seeking patents on new
products, processes and improvements when appropriate. The Company owns 23
issued United States patents, with expirations occurring between 2012 and 2018.

         Although, in the aggregate, the patents discussed above are of
considerable importance to the manufacturing and marketing of many of its
products, the Company does not consider any single patent or trademark or group
of patents or trademarks to be material to its business as a whole, except for
the STRATTEC and STRATTEC with logo trademarks.

         The Company also relies upon trade secret protection for its
confidential and proprietary information. The Company maintains confidentiality
agreements with its key executives. In addition, the Company enters into
confidentiality agreements with selected suppliers, consultants and associates
as appropriate to evaluate new products or business relationships pertinent to
the success of the Company. However, there can be no assurance that others will
not independently obtain similar information and techniques or otherwise gain
access to the Company's trade secrets or that the Company can effectively
protect its trade secrets.

DEPENDENCE UPON SIGNIFICANT CUSTOMERS

         A very significant portion of the Company's annual sales are to General
Motors Corporation, Ford Motor Company and DaimlerChrysler Corporation. These
three customers accounted for 85% of the Company's total net sales in each
fiscal year 1997 through 1999. Further information regarding sales to the
Company's largest customers is set forth under "Sales to Largest Customers"
included on page 21 of the Company's 1999 Annual Report to Shareholders, which
is incorporated herein by reference.



<PAGE>   3


The products sold to these customers are model specific, fitting only certain
defined applications. Consequently, the Company is highly dependent on its major
customers for their business, and on these customers' ability to produce and
sell vehicles which utilize the Company's products. The Company has enjoyed
relationships with General Motors Corporation, DaimlerChrysler Corporation and
Ford Motor Company in the past, and expects to do so in the future. However, a
significant change in the purchasing practices of, or a significant loss of
volume from, one or more of these customers could have a detrimental effect on
the Company's financial performance.

SALES AND MARKETING

         The Company provides its customers with engineered locksets, which are
unique to specific vehicles. Any given vehicle will typically take 1 to 3 years
of development and engineering design time prior to being offered to the public.
The locksets are designed concurrently with the vehicle. Therefore, commitment
to the Company as the production source occurs 1 to 3 years prior to the start
of production.

         The typical process used by the "Big Three" automotive manufacturers in
selecting a lock supplier is to offer the business opportunity to the Company
and various of the Company's competitors. Each competitor will pursue the
opportunity, doing its best to provide the customer with the most attractive
proposal. Price pressure is strong during this process but once an agreement is
reached, the price is fixed for each year of the product program. Typically,
price reductions resulting from productivity improvement by the Company are
included in the contract and are estimated in evaluating each of these
opportunities by the Company. A blanket purchase order, a contract indicating a
specified part will be supplied at a specified price during a defined time
period, is issued by customers for each model year and releases, quantity
commitments, are made to that purchase order for weekly deliveries to the
customer. As a consequence and because the Company is a "Just-in-Time" supplier
to the automotive industry, it does not maintain a backlog of orders in the
classic sense for future production and shipment.

COMPETITION

         The Company competes with domestic and foreign-based competitors on the
basis of custom product design, engineering support, quality, delivery and
price. While the number of direct competitors is currently relatively small, the
auto manufacturers actively encourage competition between potential suppliers.
Although the Company may not be the lowest cost producer, it has a dominant
share of the North American market because of its ability to provide a
beneficial combination of price, quality and technical support. In order to
reduce lockset production costs while still offering a wide range of technical
support, the Company utilizes assembly operations in Mexico, which results in
lower assembly labor costs as compared to the United States.

         As locks become more sophisticated and involve additional electronics,
competitors with specific electronic expertise may emerge to challenge the
Company.

RESEARCH AND DEVELOPMENT

         The Company engages in research and development activities pertinent to
the automotive security industry. A major area of focus for research is the
expanding role of electronic interlocks and modes of communicating authorization
data between consumers and vehicles. Development activities include new
products, applications and product performance improvement. In addition,
specialized data collection equipment is developed to facilitate increased
product development efficiency and continuous quality improvements. For fiscal
years 1999, 1998, and 1997, the Company spent $2,680,000, $2,469,000, and
$2,713,000, respectively, on research and development. The Company believes
that, historically, it has committed sufficient resources to research and
development and anticipates increasing such expenditures in the future as
required to support additional product programs associated with both existing
and new customers. Patents are pursued and will continue to be pursued as
appropriate to protect the Company's interests resulting from these activities.


<PAGE>   4



CUSTOMER TOOLING

         An important aspect of the Company's production processes is customer
program specific assembly lines and production tooling. In general, capital
equipment acquired by the Company for customer product programs is recognized as
a long-term asset and depreciated. Tooling for these same programs, obtained
primarily from third party tool suppliers, is accumulated as a current asset on
the Company's balance sheet and rebilled to the customer upon formal product
approval from the customer. For certain products, the Company retains ownership
of both the equipment and tooling. Recovery of these costs occurs over the life
of the program through the piece price. See Notes to Consolidated Financial
Statements included in the Company's 1999 Annual Report to Shareholders, which
is incorporated herein by reference.

ENVIRONMENTAL COMPLIANCE

         As is the case with other manufacturers, the Company is subject to
federal, state, local and foreign laws and other legal requirements relating to
the generation, storage, transport, treatment and disposal of materials as a
result of its lock and key manufacturing and assembly operations. These laws
include the Resource Conservation and Recovery Act (as amended), the Clean Air
Act (as amended), the Clean Water Act of 1990 (as amended) and the Comprehensive
Environmental Response, Compensation and Liability Act (as amended). The Company
believes that its existing environmental management policies and procedures are
adequate and it has no current plans for substantial capital expenditures in the
environmental area.

         Contamination existing at the Company's Milwaukee site from an
underground waste coolant storage tank and a former above-ground solvent storage
tank, located on the east side of the facility, will be remediated in accordance
with federal, state and local requirements.

         The Company does not currently anticipate any materially adverse impact
on its results of operations, financial condition or competitive position as a
result of compliance with federal, state, local and foreign environmental laws
or other legal requirements. However, risk of environmental liability and
charges associated with maintaining compliance with environmental laws is
inherent in the nature of the Company's business and there is no assurance that
material liabilities or charges could not arise.

EMPLOYEES

         At June 27, 1999, the Company had approximately 2,870 full-time
employees, of which approximately 515 or 18 percent, were represented by a labor
union.

ITEM 2.  PROPERTIES

         The Company has two manufacturing plants, one warehouse, and a sales
office. These facilities are described as follows:

<TABLE>
<CAPTION>

      LOCATION                                     TYPE                                     SQ. FT.  OWNED OR LEASED
      --------                                     ----                                     -------  ---------------
<S>                            <C>                                                          <C>      <C>
Milwaukee, Wisconsin           Headquarters and General Offices; Component
                               Manufacturing, Assembly and Service Parts Distribution...    352,000      Owned
Juarez, Chihuahua Mexico       Subsidiary Offices and Assembly..........................     97,000      Owned
El Paso, Texas                 Finished Goods Warehouse.................................     12,500      Leased**
Troy, Michigan                 Sales Office for Detroit Area............................      3,000      Leased**
</TABLE>

-------------------
**   Leased unit within a complex.

The Company believes that both of its production facilities are adequate for the
foreseeable future.

ITEM 3.  LEGAL PROCEEDINGS

         In the normal course of business the Company may be involved in various
legal proceedings from time to time. The Company does not believe it is
currently involved in any claim or action the ultimate disposition of which
would have a material adverse effect on the Company or its financial condition.



<PAGE>   5


ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

         There were no matters submitted to a vote of shareholders during the
fourth quarter of fiscal 1999.

EXECUTIVE OFFICERS OF REGISTRANT

The names, ages and positions of all executive officers of the Company as of the
date of this filing are listed below, together with their business experience
during the past five years. Executive officers are appointed annually by the
Board of Directors at the meeting of directors immediately following the annual
meeting of shareholders. There are no family relationships among any of the
executive officers of the Company, nor any arrangements or understanding between
any such officer and another person pursuant to which he was appointed as an
executive officer.

<TABLE>
<CAPTION>
NAME AND AGE                    POSITION AND BUSINESS EXPERIENCE
------------                    --------------------------------
<S>                             <C>
Harold M. Stratton II, 51       Chairman and Chief Executive
                                Officer of the Company since 1999. President and
                                Chief Executive Officer of the Company 1994 to
                                1999. Vice President of Briggs & Stratton
                                Corporation and General Manager of the
                                Technologies Division of Briggs & Stratton
                                Corporation since 1989.

John G. Cahill, 42              President and Chief Operating Officer of the
                                Company since 1999. Executive Vice President,
                                Chief Financial Officer, Treasurer and Secretary
                                of the Company 1994 to 1999. Vice President,
                                Chief Financial Officer, Secretary and
                                Treasurer, Johnson Worldwide Associates, Inc.
                                (manufacturer and marketer of recreational and
                                marking systems products) 1992 to 1994 and
                                Corporate Controller from 1989 to 1992.

Michael R. Elliott, 43          Vice President - Global Market Development since
                                1999. Vice President - Sales and Marketing of
                                the Company 1994 to 1999. Vice President -
                                Marketing and Sales of the Technologies Division
                                since 1993. Vice President - Corporate
                                Development of Iverness Casting Group (a
                                producer of castings and injection molded
                                products) from 1991 to 1992. Vice President -
                                Sales and Marketing of Iverness Casting Group
                                from 1990 to 1991. Sales, Marketing and Planning
                                Manager of the AC Rochester Division of General
                                Motors Corporation (an automotive manufacturer)
                                from 1988 to 1990.

Gerald L. Peebles, 56           Vice President and General Manager of STRATTEC
                                de Mexico - since 1997. Vice President -
                                Operations of the Company 1995 - 1997. Vice
                                President - Operations of the Technologies
                                Division since 1994. Operations Manager - Juarez
                                Plant of the Technologies Division from 1990 to
                                1994. Plant Manager - Juarez Plant of the
                                Technologies Division from 1988 to 1990.

Donald J. Harrod, 55            Vice President -  Engineering of the Company
                                since 1998. Product Engineering Manager,
                                Mertior/Rockwell (manufacturer of automotive
                                parts) 1997 to 1998. Vice President -
                                Engineering, Coltec Farnem Holley (manufacturer
                                of automotive parts) 1986 to 1997.

Patrick J. Hansen, 40           Vice President, Chief Financial Officer,
                                Secretary and Treasurer of the Company since
                                1999. Corporate Controller of the Company 1995
                                to 1999. Controller, Schwarz Pharma
                                (manufacturer of pharmaceutical drugs) 1993 to
                                1995. Corporate Controller, ASAA Inc.
                                (manufacturer of automotive parts) 1989 to 1993.
</TABLE>


<PAGE>   6


                                     PART II

ITEM 5.  MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

         The information set forth in the "Quarterly Financial Data" section
appearing on page 23 of the Company's 1999 Annual Report to Shareholders is
incorporated herein by reference.

         The Company does not intend to pay cash dividends on the Company Common
Stock in the foreseeable future; rather, it is currently anticipated that
Company earnings will be retained for use in its business. The future payment of
dividends will depend on business decisions that will be made by the Board of
Directors from time to time based on the results of operations and financial
condition of the Company and such other business considerations as the Board of
Directors considers relevant. The Company's revolving credit agreement contains
restrictions on the payment of dividends. See Notes to Consolidated Financial
Statements included in the Company's 1999 Annual Report to Shareholders, which
is incorporated herein by reference.

ITEM 6.  SELECTED FINANCIAL DATA

         The information set forth under "Five Year Financial Summary" which
appears on page 23 of the Company's 1999 Annual Report to Shareholders is
incorporated herein by reference.

ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS AND
         FINANCIAL CONDITION

         The information set forth under "Management's Discussion and Analysis"
which appears on pages 10 through 12 of the Company's 1999 Annual Report to
Shareholders is incorporated herein by reference.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

         The Company did not hold any market risk sensitive instruments during
the period covered by this report.

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

         The financial statements, together with the report thereon of Arthur
Andersen LLP dated July 29, 1999, which appear on pages 13 through 23 of the
Company's 1999 Annual Report to Shareholders, are incorporated herein by
reference.

         The Quarterly  Financial Data (unaudited)  which appears on page 23 of
the Company's 1999 Annual Report to Shareholders is incorporated herein by
reference.

ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
         FINANCIAL DISCLOSURE

         None
                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

         The information on pages 2 through 6 of the Company's Proxy Statement,
dated September 21, 1999, under "Election of Directors" and "Section 16(a)
Beneficial Ownership Reporting Compliance" is incorporated herein by reference.

ITEM 11. EXECUTIVE COMPENSATION

         The information on pages 7 through 14 of the Company's Proxy Statement,
dated September 21, 1999, under "Executive Compensation" and "Compensation of
Directors" is incorporated herein by reference.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

         The information on pages 3 through 6 of the Company's Proxy Statement,
dated September 21, 1999, under "Security Ownership" is incorporated herein by
reference.
<PAGE>   7

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

         The information on pages 7 through 14 of the Company's Proxy Statement,
dated September 21, 1999, under "Executive Compensation" is incorporated herein
by reference.


                                     PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K

         (a)  Documents Filed as part of this Report

              (1) Financial Statements - The following financial statements of
                  the Company, included on pages 13 through 22 of the Company's
                  1999 Annual Report to Shareholders, are incorporated by
                  reference in Item 8.

                  Report of Independent Public Accountants

                  Balance Sheets - as of June 27, 1999 and June 28, 1998

                  Statements of Income - years ended June 27, 1999, June 28,
                  1998 and June 29, 1997

                  Statements of Changes in Equity - years ended June 27, 1999,
                  June 28, 1998 and June 29, 1997

                  Statements of Cash Flows - years ended June 27, 1999, June 28,
                  1998 and June 29, 1997

                  Notes to Financial Statements

                  (2)  Financial Statement Schedules
<TABLE>
<CAPTION>
                                                                                  Page in this
                                                                                Form 10-K Report
                                                                                ----------------

<S>                                                                             <C>
                  Report of Independent Public Accountants                              8
                  Schedule II - Valuation and Qualifying Accounts                       9
</TABLE>

                  All other schedules have been omitted because they are not
              applicable or are not required, or because the required
              information has been included in the Financial Statements or Notes
              thereto.

              (3) Exhibits. See "Exhibit Index" beginning on page 11.

         (b)  Reports on Form 8-K

              No reports on Form 8-K were filed by the Company during the fourth
              quarter of fiscal 1999.





<PAGE>   8






                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS


We have audited in accordance with generally accepted auditing standards the
consolidated financial statements included in the STRATTEC SECURITY CORPORATION
Annual Report to Shareholders incorporated by reference in this Form 10-K and
have issued our report thereon dated July 29, 1999. Our audit was made for the
purpose of forming an opinion on those statements taken as a whole. The schedule
listed in the accompanying index is the responsibility of the Company's
management and is presented for purposes of complying with the Securities and
Exchange Commission's rules and is not part of the basic consolidated financial
statements. This schedule has been subjected to the auditing procedures applied
in the audit of the basic consolidated financial statements and, in our opinion,
fairly states in all material respects the financial data required to be set
forth therein in relation to the basic consolidated financial statements taken
as a whole.




ARTHUR ANDERSEN LLP


Milwaukee, Wisconsin,
July 29, 1999.





<PAGE>   9




                                   SCHEDULE II
                        VALUATION AND QUALIFYING ACCOUNTS
                             (THOUSANDS OF DOLLARS)

<TABLE>
<CAPTION>

                                              Balance,        Provision         Payments       Balance,
                                             Beginning        Charged to       and Accounts     End of
                                              of Year        Profit & Loss      Written Off      Year
                                              -------        -------------      -----------      ----
<S>                                          <C>             <C>               <C>             <C>
Year ended June 27, 1999
Allowance for doubtful accounts                 $250               $33              $33            $250
                                                ====               ===              ===            ====

Year ended June 28, 1998
Allowance for doubtful accounts                 $250                $0               $0            $250
                                                ====                ==               ==            ====

Year ended June 29, 1997
Allowance for doubtful accounts                 $250                $0               $0            $250
                                                ====                ==               ==            ====
</TABLE>











<PAGE>   10









                                   SIGNATURES



         Pursuant to the requirements of Section 13 of the Securities Exchange
Act of 1934, the Registrant has duly caused this report to be signed on its
behalf by the undersigned thereunto duly authorized.



                                       STRATTEC SECURITY CORPORATION
                                       By:   /s/ Harold M. Stratton II
                                           ------------------------------
                                       Harold M. Stratton II, Chairman and
                                       Chief Executive Officer

Date:  August 24, 1999

         Pursuant to the requirement of the Securities Exchange Act of 1934,
this report has been signed below by the following persons on behalf of the
Registrant and in the capacities and on the dates indicated.

<TABLE>
<CAPTION>
         Signature                                Title                        Date
         ---------                                -----                        ----
<S>                                    <C>                                 <C>
/s/  Harold M. Stratton II             Chairman and Chief Executive        August 24, 1999
-------------------------------
      Harold M. Stratton II                       Officer


/s/  John G. Cahill                    President and Chief Operating       August 24, 1999
-------------------------------
      John G. Cahill                              Officer


/s/  Frank J. Krejci                              Director                 August 24, 1999
-------------------------------
      Frank J. Krejci


/s/  Michael J. Koss                              Director                 August 24, 1999
-------------------------------
      Michael J. Koss


/s/  Robert Feitler                               Director                 August 24, 1999
-------------------------------
      Robert Feitler

</TABLE>





<PAGE>   11


                         EXHIBIT INDEX TO ANNUAL REPORT
                                  ON FORM 10-K
<TABLE>
<CAPTION>
                                                                                                     Page Number in
                                                                                                  Sequential Numbering
                                                                                                  of all Form 10-K and
Exhibit                                                                                              Exhibit Pages
-------                                                                                              -------------
<S>      <C>                                                                                      <C>
3.1 (2)  Amended and Restated Articles of Incorporation of the Company                                     *

3.2 (2)  By-laws of the Company                                                                            *

4.1 (2)  Rights Agreement between the Company and Firstar Trust Company, as Rights Agent                   *

4.2 (3)  Revolving Credit Agreement dated as of February 27, 1995 by and between the Company               *
         and M&I Bank, together with Revolving Credit Note

10.1(5)  STRATTEC SECURITY CORPORATION Stock Incentive Plan                                                *

10.2     Employment Agreements between the Company and the identified executive officers                   12

10.3(1)  Change In Control Agreement between the Company and the identified executive officers             58

10.15(4) STRATTEC SECURITY CORPORATION Economic Value Added Plan for Executive                             *
         Officers and Senior Managers

13.1     Annual Report to Shareholders for the year ended June 27, 1999                                    92

21 (1)   Subsidiaries of the Company                                                                       *

23       Consent of Independent Public Accountants dated September 17, 1999                                112

27       Financial Data Schedule                                                                           113
</TABLE>

-----------------------

(1) Incorporated by reference from Amendment No. 1 to the Form 10 filed on
    January 20, 1995.
(2) Incorporated by reference from Amendment No. 2 to the Form 10 filed on
    February 6, 1995.
(3) Incorporated by reference form the April 2, 1995 Form 10-Q filed on May 17,
    1995.
(4) Incorporated by reference from the July 2, 1995 Form 10-K filed on September
    14, 1995.
(5) Incorporated by reference from the Proxy Statement for the 1997 Annual
    Meeting of Shareholders filed on September 10, 1997.