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 5920-01-369-5346
NSN 5935-00-270-1271
NSN 5910-01-045-5307
NSN 5925-00-809-2464
NSN 5905-00-728-1846
NSN 2925-01-123-5856
NSN 6240-00-895-6461
NSN 6150-00-623-0420
NSN 5965-00-568-5802
NSN 5999-01-050-6018
NSN 6105-00-401-5379
NSN 5990-01-468-1292