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 5905-01-119-2395
NSN 5855-01-147-4785
NSN 5910-01-326-9863
NSN 5999-01-136-1997
NSN 5920-00-206-3595
NSN 6610-00-477-7931
NSN 6110-01-387-8965
NSN 6135-01-226-4071
NSN 5925-01-373-2324
NSN 5895-01-256-0075
NSN 6650-01-530-0589
NSN 5945-00-190-5807