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 6130-00-435-2199
NSN 6645-01-172-6838
NSN 5835-01-514-5758
NSN 5895-00-583-8339
NSN 5920-01-065-1824
NSN 6135-01-222-0703
NSN 6320-01-284-4508
NSN 5905-00-184-8377
NSN 5950-01-423-9397
NSN 6145-01-551-0682
NSN 5999-00-883-5921
NSN 6135-00-553-7995