A nut having 1 convex, spherical bearing surface and 6 flat sides. Items may have a removable collar. See also nut (1), plain, cone seat, hexagon.
NSN 5990-01-586-8202
NSN 5920-01-086-7219
NSN 6320-01-364-1840
NSN 5930-01-619-0854
NSN 6620-00-421-7509
NSN 6320-01-134-7267
NSN 5996-01-363-6037
NSN 6645-01-469-2458
NSN 5925-01-372-7137
NSN 6240-01-624-1777
NSN 5905-01-607-6903
NSN 5975-01-371-1609