MIL-DTL-55302/66G
Requirements:
Dimensions and configuration: See figure 1.
Material: 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.
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 0.76, or type III,
code A, 0.076 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 engagement and separation forces (number 22 contacts):
Minimum separation: 0.5 ounce.
Maximum engagement: 12.0 ounces for standard force and 4.0 ounces for low force.
Mating and unmating:
Standard insertion force contacts: The maximum mating force, in pounds, shall be the number of contacts
multiplied by 0.56 and the withdrawal force, in pounds, shall be a minimum of 0.08 times the number of contacts
and shall not exceed the measured insertion force.
Low insertion force contacts: The maximum mating force, in pounds, shall be the number of contacts multiplied by
0.25 and the withdrawal force, in pounds, shall be a minimum of 0.04 times the number of contacts and shall not
exceed the maximum insertion force.
NOTE: Not applicable when mating and unmating is accomplished through the engaging of turning jacksets.
Jackscrew and jack socket torque: 2-inch pounds maximum fully mated.
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.
Insertion and removal tool: MIL-I-81969/12.
Crimp tool: M22520/2-01
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