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 6150-00-570-4548
NSN 6685-01-387-1142
NSN 6645-01-113-8979
NSN 5855-00-444-2298
NSN 5965-01-396-7508
NSN 5905-01-326-1293
NSN 6130-01-542-9235
NSN 6320-01-652-3806
NSN 6610-00-004-0332
NSN 5975-00-465-9507
NSN 6685-01-439-3564
NSN 5930-01-196-0896