MIL-DTL-55302/57H
Requirements:
Dimensions and configuration: See figure 1.
Material: Guide pins, type X guide sockets, jackscrews and jack sockets shall be made of corrosion resisting
stainless steel in accordance with ASTM A581 or ASTM A582 passivated in accordance with SAE-AMS-QQ-P-35
or shall be corrosion resistant copper nickel alloy (61 ±2% nickel, 2.5% max. other, and the balance zinc and shall
have a brinell hardness of 145 to 175. Type Y guide sockets shall be beryllium copper in accordance with
ASTM B196 or ASTM B197, nickel plated in accordance with SAE-AMS-QQ-N-290, class 2, 50 to 150
microinches.
Plating: The contact plating shall be in accordance with MIL-DTL-55302 or gold in accordance with ASTM B488
type II, code C, class 1.27, over nickel plating in accordance with SAE-AMS-QQ-N-290, class 2, 50 to 150
microinches in the engaging area and gold in accordance with ASTM B488 type II, code C, class 0.51, or type III,
code A, class 0.051 over nickel plating in accordance with SAE-AMS-QQ-N-290, class 2, 50 to 150 microinches in
the termination area and gold in accordance with.
Contact identification: See figure 1.
Contact resistance: The average contact resistance of all contacts measured shall not exceed 0.010 ohm, and no
individual contact pair shall have a resistance exceeding 0.020 ohm.
Dielectric withstanding voltage:
Sea level: 1,000 volts rms.
High altitude: 300 volts rms.
Current rating: 5.0 amperes maximum in accordance with contact.
Polarization: Type X, regular, guide pin and socket, full round (see figure 1). Type Y, adjustable "D" shaped guide
pin and/or socket (see figure 1, details A and B). All connectors are supplied in the -1 polarized position. For
other than OEM use, connectors may be repolarized by using M55302/57-01 spanner wrench and M55302/57-02
guide pin and guide socket kit. When guides are removed and reinstalled in another position apply Loctite 83-CV
or equivalent to the threads. Ordering connectors in other than the -1 polarized position may be done by the
OEM's by placing the desired polarized position in brackets three spaces after the Part or Identifying Number (PIN)
on the purchase order. Example M55302/57-A10Y [-32]. Polarization pins and sockets shall be adjusted to any
desired configuration by spanner wrench (M55302/57-01). Ordering connectors in the -1 polarized position without
Loctite 83-CV or equivalent applied may be done by placing a "-0" in brackets three spaces after the part on the
purchase order. Guide sets, as installed, shall withstand 7-inch ounces backoff torque applied through the guide
set mounting nut.
M55302/57-02 kit: Consists of one type Y "D" shaped guide socket and one type Y "D" shaped guide pin.
Example of PIN:
M55302/57
A
10
L
Basic number of
Type of terminal
Number of contacts
Type of mounting
specification sheet
(see figure 1)
(see figure 1)
hardware (see details
sheet
A, B, C, D, E, F of
figure 1)
A = dip terminal .109 long
Type X = full round
B = dip terminal .140 long
Type Y = "D" shaped
C = dip terminal .172 long
Type S = .135 slotted
turning jackset
Type H = .135 hex turning
jackset
5
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