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 5965-00-160-0138
NSN 5990-01-433-3786
NSN 6620-01-078-6372
NSN 6645-00-244-0359
NSN 6110-01-074-0835
NSN 5930-01-299-4318
NSN 6220-01-323-1675
NSN 6135-00-377-9165
NSN 6685-00-147-8045
NSN 6320-01-406-6098
NSN 5999-00-223-7147
NSN 2925-01-461-4347