Spec data, (1) fed, (2) federal standard no. 66, (3) aisi 303 or sae 30303
A hexagonal or octagonal nut containing internal straight pipe threads. It has flat faces, one of which contains a packing recess. See also locknut, electrical conduit; locknut, tube fitting; and seal nut, pipe.
NSN 5920-01-174-8540
NSN 6110-01-630-2076
NSN 5990-01-050-7535
NSN 5960-01-632-6576
NSN 5925-01-435-1402
NSN 5975-01-075-5555
NSN 5835-01-386-4027
NSN 6145-01-167-5977
NSN 6220-01-161-6439
NSN 5999-01-113-7864
NSN 5996-00-104-5607
NSN 5996-00-277-7384