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 5975-01-471-9580
NSN 5905-01-314-1526
NSN 6220-01-499-3864
NSN 5930-00-269-4996
NSN 6650-00-068-1418
NSN 6240-01-470-3451
NSN 5855-00-779-2854
NSN 6220-00-701-0305
NSN 5895-01-111-0457
NSN 5910-00-816-5083
NSN 5996-00-289-9847
NSN 6620-01-026-0346