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 5975-01-083-4845
NSN 5925-01-594-1873
NSN 5855-01-513-8367
NSN 4140-00-613-9209
NSN 5998-01-626-4274
NSN 5998-00-036-3734
NSN 6685-00-928-2241
NSN 5998-01-140-3623
NSN 6150-00-460-9022
NSN 5855-01-359-0373
NSN 6685-01-102-2330
NSN 6130-00-521-8303