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 6220-01-537-6002
NSN 6135-01-544-8463
NSN 6620-01-213-8772
NSN 5910-00-402-1495
NSN 6110-00-989-2456
NSN 5920-00-373-3636
NSN 6685-01-546-6967
NSN 6220-00-679-5629
NSN 5945-01-605-1480
NSN 5990-01-645-2592
NSN 5925-00-205-2767
NSN 6150-01-633-5190