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.)
NSN 5925-01-599-5431
NSN 5985-01-114-4453
NSN 6220-01-452-4384
NSN 5920-00-199-9514
NSN 6610-01-159-0438
NSN 5905-00-664-4218
NSN 2925-00-365-3289
NSN 6145-00-013-9939
NSN 5990-01-455-8035
NSN 5990-00-728-8248
NSN 5935-00-576-9722
NSN 6650-00-885-3775