2a and b8
A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6620-01-533-6428
NSN 5985-01-379-0942
NSN 5920-00-455-9743
NSN 5925-00-660-7589
NSN 5965-01-495-9711
NSN 5990-01-604-0862
NSN 6130-01-551-1012
NSN 5905-01-401-5325
NSN 5998-01-495-2371
NSN 6130-01-381-1713
NSN 5895-01-323-7562
NSN 6685-01-535-4614