MIL-DTL-38999 Series IV uses a quarter-turn breech coupling instead of a threaded coupling, which allows installation and removal in confined spaces where a full thread rotation is impossible. The shell remains scoop-proof and the contact system is the same rear-release crimp design used across the 38999 family.
Parts listed here cover the Series IV wall mount and jam nut receptacles and matching plugs, including the AS85049 backshell range that pairs with them.
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Complete list of MIL-DTL-38999 Series IV Connectors — click any model for full specifications, pricing, and official manufacturer part numbers (MPN).