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 6135-01-340-2599
NSN 5905-01-123-8993
NSN 6650-01-091-8941
NSN 6685-01-171-6979
NSN 7035-00-079-7189
NSN 6650-01-449-2334
NSN 5998-00-548-1936
NSN 5990-01-074-6549
NSN 7035-00-763-6180
NSN 5835-00-351-9459
NSN 6240-01-361-9167
NSN 5855-00-310-2740