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 5999-01-378-7918
NSN 5965-00-812-9158
NSN 5990-01-264-6512
NSN 6240-01-563-3990
NSN 6685-00-531-4483
NSN 4140-01-510-7940
NSN 5855-01-628-6427
NSN 5965-01-332-6693
NSN 5990-01-242-9653
NSN 6145-00-515-6931
NSN 6110-01-551-1129
NSN 5960-01-116-7052