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.
Classification: Nuts of iron or steel
NSN 4140-00-249-5603
NSN 6645-01-616-4170
NSN 5855-01-384-7120
NSN 5925-01-436-4943
NSN 2925-01-121-3355
NSN 6130-00-165-5748
NSN 5915-00-316-6182
NSN 6130-01-129-7070
NSN 6220-01-446-6228
NSN 5855-00-014-5008
NSN 7035-00-408-8170
NSN 5835-01-478-9428