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 5905-01-403-2806
NSN 6135-01-222-0703
NSN 5985-01-447-3043
NSN 5996-01-311-1745
NSN 5975-01-561-5133
NSN 6110-00-193-2847
NSN 5985-00-420-1260
NSN 6685-01-287-2700
NSN 5990-00-402-7721
NSN 6320-00-433-2773
NSN 6610-01-029-8749
NSN 5915-00-584-3512