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 6620-00-267-5273
NSN 6220-00-728-9536
NSN 5905-01-448-9318
NSN 5975-01-369-6960
NSN 6110-01-034-7217
NSN 6130-01-624-5114
NSN 5990-01-417-4402
NSN 6135-00-998-5884
NSN 6105-01-542-1174
NSN 6685-01-453-2222
NSN 6130-00-225-3471
NSN 6150-01-210-0997