As differentiated by quality control iaw mil-q-9858
A fluid line fitting having a pipe, tube or hose connection or a through hole to accommodate a bolt, fluid passage on one end. The other end must have an external or internal thread for connecting a mating part to form a self-sealing coupling assembly. The fitting has either a self-sealing feature for the purpose of automatically shutting off the flow of fluid when disconnected from its mating half, or, if it has no self-sealing feature, is specifically designed to mate with a fitting with a self-sealing feature. For self-sealing fittings with a quick disconnect end, see coupling half, quick disconnect. For fluid line fittings without a self-sealing feature, see coupling (as modified).
NSN 5835-01-575-5053
NSN 6620-01-023-2938
NSN 4140-01-119-1538
NSN 5910-01-657-9795
NSN 6620-01-495-7446
NSN 5905-01-259-8663
NSN 2925-01-167-6500
NSN 5950-01-449-7640
NSN 5930-01-646-6198
NSN 6135-01-461-2915
NSN 7035-00-185-8683
NSN 6105-01-442-7801