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 6110-01-146-1540
NSN 6145-01-630-0926
NSN 5985-01-140-8450
NSN 5975-00-785-9288
NSN
NSN 6650-00-890-0480
NSN 6130-01-090-1425
NSN 5990-00-061-7190
NSN 6135-00-932-3136
NSN 5945-01-026-1231
NSN 6645-01-192-8717
NSN 6610-01-364-8295