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 5910-00-225-9375
NSN 6220-00-635-1317
NSN 5915-01-153-7793
NSN 5895-01-202-1288
NSN 5925-00-034-1293
NSN 6645-01-522-7447
NSN 5998-01-238-0918
NSN 5998-00-904-6381
NSN 5905-01-157-9857
NSN 5930-01-363-9888
NSN 5925-01-660-5371
NSN 5999-00-186-1192