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 5915-00-902-7127
NSN 5975-00-387-6515
NSN 6240-01-160-7934
NSN 6110-01-578-0920
NSN 6135-00-767-0331
NSN 5895-01-541-4812
NSN 5930-00-211-4316
NSN 6645-01-264-2701
NSN 5960-00-845-4940
NSN 6220-00-226-1994
NSN 5895-00-915-5246
NSN 5855-01-110-9564