21-33384-51 (PIN)
21-33385-51 (SOCKET)

21-33384-51 (PIN)
21-33385-51 (SOCKET)Contact, Pin and Socket, Quadrax, Type M38999 Series I & III Special, Size 8
Installation Instructions
See table on reverse side for quadrax cable recommended, tool selector settings,
crimping tool, positioner and insertion/removal tool information.
A 1. Cut cable for assembly of quadrax contacts.
Note: Contact assemblies of opposite gender should be assembled at cable junction adjacent ends, to have inner wire conductors in correct orientation duringcontact assembly. Crossing of inner wires from their natural lie position is not permissible.
B 1. Rubber end first, slide piggyback grommet seal back over cable jacket (not illustrated).
2. Strip cable jacket to expose cable outer braid as illustrated. Ends must be cut
cleanly and at right angles to the axial plane of the cable. Cable must not be
deformed while making cuts.
C 1. Slide crimp bushing, large diameter end first, over cable braid until cable jacket
butts inside shoulder of crimp bushing.
D 1. Flair cable braid back over crimp bushing as illustrated to expose inner wires.
Trim excess cable braid.
2. Cut off any inner braids, wraps or cable fillers as close to outer cable braid aspossible.
3. Cut inner wires to dimension shown. All wires must be cut to equal length. It may
be helpful to cut one wire to length. Then, one at a time, cut remaining wires toequal length as the first wire.
E 1. Strip inner wires to expose center conductors as illustrated. All wires must bestripped to equal length.
F 1. Carefully splay inner wires perpendicular to the axis of the cable as illustrated.
2. Assemble inner contact over cable center conductor until fully seated against
inner wire insulation. Observe center conductor through the contact’s wire
inspection hole, to make certain conductor is properly positioned.
3. Crimp inner contact to center conductor using crimp tools listed in table on back.
Repeat steps F2 and F3 until all inner contacts are crimped.
G 1. Position rear insulator against cable braid as illustrated. Make certain insulator
slots are aligned with splayed inner contact wires. One-by-one, position wired
inner contacts inside the insulator slots as shown. The inner contact’s retention
shoulder must be positioned in front of the insulator’s front surface as illustrated.

FA

CABLE
JACKET

CABLE
BRAID

.700
CABLE
JACKET

FSCM77820

INNER
WIRES

CABLE
BRAID

B

CRIMP
BUSHING

CRIMP
BUSHINGINNER CONTACTS(PINS SHOWN FOR
REFERENCE)

CABLE

CABLE JUNCTION
ADJACENT ENDS

INNER
CONTACTWIRE INSPECTION
HOLE

CABLE
BRAID

C

CRIMP
BUSHING

CABLE
BRAID

CABLE
BRAID
INNER WIRESD
TRIM
EXCESS
BRAID

REAR INSULATOR
SLOTS
INNER
CONTACTS

G.450
REAR INSULATOR
CABLE
BRAID

CRIMP
BUSHINGINNER WIRESCENTERCONDUCTORS

E

Continued on backL-2119-DApril 2003

QUADRAX
CABLE

.150

INNER CONTACTRETENTION SHOULDER

21-33384-51 (PIN)
21-33385-51 (SOCKET)REAR INSULATOR

H 1. With inner contacts positioned inside rear insulator slots, assemble front insulator overthe inner contacts as shown. The front insulator must butt the rear insulator, and innercontact retention shoulders must enter front insulator bores.
2. Observe the front insulator’s keyway. When the inner pin assembly is held in the vertical position (with inner pin contacts on top), the inner pin contact with the insulator keyway to its right will be positioned adjacent to and in alignment with the outer contact’sorientation key (for inner socket contacts, the insulator keyway should be positioned to
the left of the inner socket desired adjacent to and in alignment with the outer contact’sorientation key).
I 1. Align front insulator keyway with the outer contact’s rivet key. Slide the inner contact
assembly inside the outer contact body until fully seated. Observe the mating end of
the assembly to make certain one pair of inner contacts are in vertical alignment withthe outer contact’s orientation key.
2. Crimp outer contact body in the area indicated using crimp tools listed in table below.

AmphenolPart Number

Description

21-33384-51

Quadrax Pin(100 Ohm)

21-33385-51

Quadrax Socket(100 Ohm)

Quadrax Cable
Recommended
TensoliteNF24Q100(100 Ohm)

Inner Crimp Tools

H
REAR INSULATORSLOTS.230
CRIMP
AREA

INNER
CONTACTSI
CRIMP
BUSHINGOUTER CONTACT
BODY (PIN SHOWNFOR REFERENCE)

Outer Crimp Tools

Tool(Setting)

PositionerToolDie Set(Location)

M22520/2-01(5)

Daniels K709
(M22520/2-37)

M22520/5-01

M22520/5-45(A)

Contact Removal from Connector
Remove piggyback grommet seal from the connector grommet. Position removal tool part number MIL-I-81969/14-06, Daniels DRK-264-8,
around cable and slide tool toward connector until tool tips enter rear grommet and comes to a positive stop on the contact. Grip cable andsimultaneously remove tool, contact and cable.

Amphenol Aerospace
40-60 Delaware Avenue
Sidney, New York 13838-1395
Website: www.amphenol-aerospace.com

FRONTINSULATORKEYWAYOUTER CONTACTORIENTATION KEYContact Insertion into Connector
Contacts are inserted by hand. Insert the contact assembly into the proper rear grommet hole. Contact must be aligned with hole and notinserted at an angle. The contact’s orientation key must be in vertical alignment with the connector’s main key or keyway (holding contact keyand connector key/keyway at “12 o’clock” orientation position is recommended). Push forward until contact is felt to snap into position within
the insert. Contact may need to be slightly rotated to properly align contact orientation key with connector insert keyway. Gently tug on cable
to assure retention. Slide piggyback grommet seal into position inside the connector grommet and over the crimped end of the contact.

Amphenol

FRONT
INSULATOROUTER CONTACT
RIVET KEY