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 5960-00-158-4841
NSN 5990-01-411-5930
NSN 6145-01-480-3524
NSN 6685-01-191-1539
NSN 6240-00-624-8440
NSN 5965-01-514-7231
NSN 5930-01-555-5008
NSN 5915-00-747-9679
NSN 5925-01-359-6329
NSN 5975-00-446-6852
NSN 5999-00-144-7698
NSN 5895-01-551-9373