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 5975-01-269-8421
NSN 5905-00-089-8881
NSN 5998-01-440-3410
NSN 5985-00-256-5022
NSN 5925-01-339-6540
NSN 5925-01-261-4215
NSN 7035-01-150-6303
NSN 6150-01-349-9889
NSN 6685-01-108-5782
NSN 5950-00-703-3583
NSN 5990-01-254-2936
NSN 6620-00-453-8180