MIL-DTL-55181 covers the heavy, keyed military power connectors used for vehicle and manpack DC power — four size 12 contacts at 35 A in the /1 to /4 configurations, eighteen size 20 contacts in the /7 and /8 configurations. The best-known installation is the SINCGARS vehicle adaptor, where an M55181 pair carries power in and power out to mount the radio in a vehicle. Every configuration is a QPL item and is ordered by slash-sheet digit plus the two-digit cable-size designator.
Ordering is by the full dash number: the digit after the slash sheet selects plug or receptacle and the contact gender, and the trailing two digits select the cable entry from the specification sheet. Shells are aluminium alloy with a steel alloy nosepiece, cadmium plated with olive drab chromate as standard, with finish letters E (cadmium), N (nickel) and B (RoHS-compliant black nickel).
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Complete list of MIL-DTL-55181 Power Connectors — click any model for full specifications, pricing, and official manufacturer part numbers (MPN).