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 4140-01-087-3336
NSN 6110-01-160-1857
NSN 6130-01-432-2415
NSN 5945-01-535-7037
NSN 5950-01-370-7837
NSN 6645-01-595-3945
NSN 5930-00-149-1696
NSN 6645-01-394-5149
NSN 6620-01-577-6285
NSN 5975-00-079-0022
NSN 5920-01-520-3219
NSN 5905-00-402-2579