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 dur-
ing contact assembly. Crossing of inner wires from their natural lie position is not
permissible.
B 1. Rubber end rst, slide piggyback grommet seal back over cable jacket (not illus-
trated).
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 de-
formed while making cuts.
C 1. Slide crimp bushing, large diameter end rst, 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 o any inner braids, wraps or cable llers as close to outer cable braid as
possible.
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 to
equal length as the rst wire.
E 1. Strip inner wires to expose center conductors as illustrated. All wires must be
stripped 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 in-
spection 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 illus trated.
H 1. With inner contacts positioned inside rear insulator slots, assemble front insula-
tor over the inner contacts as shown. The front insulator must butt the rear insula-
Continued on back
L-2119-D FSCM77820
April 2014
21-33384-51 (PIN)
21-33385-51 (SOCKET)
B
C
A
D
E
F
G
QUADRAX
CABLE
CABLE JUNCTION
ADJACENT ENDS
.700
CABLE
BRAID
CABLE
JACKET
CABLE
JACKET
CRIMP
BUSHING
CABLE
BRAID
CRIMP
BUSHING
CABLE
BRAID
INNER WIRES
.450
TRIM
EXCESS
BRAID
CRIMP
BUSHING
CABLE
BRAID
INNER WIRES
CENTER
CONDUCTORS
.150
CRIMP
BUSHING
INNER CONTACTS
(PINS SHOWN FOR
REFERENCE)
CABLE
CABLE
BRAID
INNER
CONTACT
WIRE INSPECTION
HOLE
INNER
WIRES
CABLE
BRAID
REAR INSULATOR
SLOTS
INNER
CONTACTS
INNER CONTACT
RETENTION SHOULDER
REAR INSULATOR
tor, and inner contact retention shoulders must enter front insulator bores.
2. Observe the front insulator’s keyway. When the inner pin assembly is held in the ver-
tical 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 con-
tact’s orientation key (for inner socket contacts, the insulator keyway should be posi-
tioned to the left of the inner socket desired adjacent to and in alignment with the outer
contact’s orientation 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 with
the outer contact’s orientation key.
2. Crimp outer contact body in the area indicated using crimp tools listed in table below.
Amphenol
Part Number
Description
Quadrax Cable
Recommended
Inner Crimp Tools Outer Crimp Tools
Tool
(Setting)
Positioner Tool
Die Set
(Location)
21-33384-51
Quadrax Pin
(100 Ohm)
Tensolite
NF24Q100
(100 Ohm)
M22520/2-01
(5)
Daniels K709
(M22520/2-37)
M22520/5-01
Daniels Y1999 (A)
or
M22520/5-45 (A)
21-33385-51
Quadrax Socket
(100 Ohm)
Contact 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 not in-
serted at an angle. The contact’s orientation key must be in vertical alignment with the connector’s main key or keyway (holding contact key and
connector key/keyway at “12 o’clock” orientation position is recommended). Push forward until contact is felt to snap into position within the in-
sert. 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.
Contact Removal from Connector
Remove piggyback grommet seal from the connector grommet. Position removal tool part number MIL-I-81969/14-12, 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 and si-
multaneously remove tool, contact and cable.
Amphenol
Amphenol Aerospace
40-60 Delaware Avenue
Sidney, New York 13838-1395
Website: www.amphenol-aerospace.com
21-33384-51 (PIN)
21-33385-51 (SOCKET)
I
H
REAR INSULATOR
FRONT
INSULATOR
REAR INSULATOR
SLOTS
INNER
CONTACTS
FRONT
INSULATOR
KEY WAY
OUTER CONTACT
ORIENTATION KEY
OUTER CONTACT
RIVET KEY
OUTER CONTACT
BODY (PIN SHOWN
FOR REFERENCE)
CRIMP
BUSHING
.230
CRIMP
AREA
