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 6620-01-619-9263
NSN 6320-01-283-1300
NSN 6110-00-753-7677
NSN 6320-01-435-5991
NSN 5905-01-212-9683
NSN 5975-01-131-0770
NSN 5855-01-413-2213
NSN 7035-01-528-7870
NSN 5925-01-236-8070
NSN 5905-00-596-0322
NSN 5960-01-328-8248
NSN 5905-01-059-5504