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 5945-01-026-1231
NSN 5910-00-388-6737
NSN 5925-00-611-4120
NSN 6685-01-401-5360
NSN 6320-01-150-5378
NSN 6150-00-838-0246
NSN 5998-00-148-1636
NSN 5965-01-233-8607
NSN 6240-00-702-1814
NSN 6220-01-500-8933
NSN 6105-01-594-2251
NSN 5975-01-557-7402