An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 5935-00-432-0270
NSN 2925-01-439-2650
NSN 5905-01-557-1836
NSN 7035-01-575-8510
NSN 6135-01-307-2749
NSN 5905-01-151-1194
NSN 2925-01-236-0015
NSN 5910-00-411-5504
NSN 6320-00-905-0543
NSN 6650-00-161-4122
NSN 5935-00-071-8831
NSN 5965-00-581-9978