From the Ministry of Science, Industry and Technology:  
 
COMMUNIQUÉ ON  
TS 1031 ‘‘ BOLT AND WASHER SETS – REGULAR SCREW THREADED AND 
NON -FALLING CONICAL SPRING WASHER SETS ’’ 
 (COMMUNIQUÉ NO: MSG - MS - 2017/   ) 
 
Purpose  
ARTICLE 1 – (1) The purpose of this Communiqué is to identify issues related to the 
implementatio n of the revision  of TS 1031  (April  2017) standard.  
 
Scope  of this standard  
 
ARTICLE 2 – (1) This standard covers M2.5 to M12 regular screw threaded of which  
strength class is 8.8 to 10.9 (10.9 included) and bolt/screw with flat seating face and non -
falling (fixed)  conical, spring, washer -containing screw and washer assembly tolls in 
description, classification and specifications, sampling, inspection and testi ng, and  based on 
market supply.  
(2) As a result of installation process of spring washers (given within the scope of TS 
79-5), it is intended to eliminate relaxation effect in bolted connections. These cannot  prevent 
actively loose connection under varying  radial load and therefore usually  designed for the 
purpose of using with short screw exposed to axial pressure.  
(3) Star screwdriver twisted screws, critical cross -sectional body not to be in threaded 
part but be in the beginning screws, is not suitable for bolt and washer sets. For restrictions in 
use of these bolts it should be viewed to the related product standard.  
(4) NOT 1 Standardized bolt/screw and washer combinations and related symbols are 
given in TS EN ISO 10644. NOT 2 In this standard, from n ow on instead ‘‘regular threaded 
and non -falling conical spring washer assembly tools’’ expression purely ‘‘non -falling washer 
bolt’’ term is used.  
Legal Basis  
ARTICLE 3 – (1) This  Communiqué has been drawn up based on the Decree Law No. 
635 on Organisati on and Duties of the Ministry of Science, Industry and Technology dated 
3/6/2011; Law No. 1705 on the Prevention of Adulteration in Trade and Supervision and 
Protection of Exports dated 10/6/1930; Law No. 132 establishing Turkish Standards Institution 
dated 18/11/1960 and Regulation on Mut ual Recognition in Non -harmonised  Areas that was 
published in the Official Gazette No. 28332 dated 23/6/2012 and put into force with the 
Decision No. 2012/3169 of the Council of Ministers dated 2/5/2012.  
 
Putting into Effe ct 
  ARTICLE 4 – (1) ‘‘ TS 1031  Bolts, Non- Falling Washer , Metric Screw ’’ is canceled. 
Instead “ TS 1031  Bolt and Washer Sets - Regular Screw Threaded and Non -Falling Conical 
Spring Washer Sets ’’ was adopted and decided to be published in the meeting of Technical 
Board of Turkish Standards Institution (TSE) dated 10/04 /2017 has been put into effect as 
mandatory i n manufacturing and placing on the market . 
  
 
Compliance Obligation  
ARTICLE 5 – (1) Those who produce and sell products within the scope of TS 1031  
(April  2017)  Standard shall be obliged to comply with the provisions of this Communiqué.  
 
Mutual Recognition Clause  
ARTICLE 6 – (1)  The provisions of this Communiqué on ‘‘ TS 1031  Bolts, N on-
Falling Washer, Metric Screw ’’ (April 2017)  shall not apply to the products which were legally 
produced or put into free circulation in a Member State of the European Union.  
   (2) Nonetheless, the Ministry of Science, Industry and Technology may 
submit  the product referred to in paragraph (1) to an evaluation following the rules and 
procedures laid down in Chapter Three of Regulation on Mutual Recognition in Non -
Harmonised Area and as a result of this evaluation if it finds out that this product does no t 
provide a level of protection equivalent to that sought by this Communiqué on ‘‘ TS 1031  Bolts, 
Non-Falling Washer, Metric Screw ’’ it may prohibit placing on the market of the product, make 
its placing on the market subject to prior conditions or have the product withdrawn or recalled 
from the market.  
 
Provision  
ARTICLE 7 – (1) TS 1031  (April  2017) Standard shall be obtained from the  central 
organization or provincial representative offices of TSE. Contact information can be accessed 
from the website of the TSE.  
 
Repeal  
 ARTICLE 8 – (1) TS 1031  Standard in that was published in the Official Gazette No:  
14577  and dated 27/6/1973 has been repealed.  
 
Entry into Force  
ARTICLE 9 – (1) This Communiqué shall enter into force three months after its 
publication.  
 
Enforcement  
ARTICLE 10 – (1) The provisions of this Communiqué shall be enforced by the 
Minister of Scienc e, Industry and Technology.