D38999 Backshell — Straight, Shell 21, Electroless Nickel

Specifications

Cross-Brand Compatibility

Applications

The M85049/1821N05A is a straight backshell for MIL-DTL-38999 Series III and IV connectors in shell size 21, with entry size 05 and the A variant. In the M85049/18 part number the shell size follows the slash sheet, then the finish letter, then the entry (clamp) size and the optional variant letter. The finish letter N is electroless nickel — a hard, conductive, cadmium-free plate that meets RoHS/REACH restrictions on cadmium and is the finish most often specified for new European and commercial-derivative designs, while W (olive drab cadmium over electroless nickel) remains the legacy military finish. In the same M85049 slash-sheet family, /19 is the straight band-lock version and /20 the straight spin-coupling version.

DLA Land and Maritime solicited this part number on DIBBS solicitation SPE7M5-26-T-461M — four units against NSN 5935-01-381-0043, delivered to the Serco kitting facility at Oxnard, California, under SAE-AS85049. It is a QPL (FSC 5935) item.