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 6150-01-279-7855
NSN 6610-01-615-8260
NSN 5999-01-034-6774
NSN 6320-01-046-5228
NSN 5975-01-535-1835
NSN 4140-01-315-1986
NSN 6685-01-318-5996
NSN 6610-00-229-6742
NSN 5998-00-559-8695
NSN 6620-01-557-6512
NSN 6240-00-859-5936
NSN 5855-00-361-0167