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 5945-00-337-0454
NSN 5965-01-308-3786
NSN 5975-00-935-5946
NSN 5985-01-582-1927
NSN 6620-01-214-7520
NSN 5905-01-519-4963
NSN 6320-00-322-3460
NSN 5965-01-243-5494
NSN 5996-00-178-1016
NSN 5975-01-557-1888
NSN 6130-00-393-0645
NSN 5945-00-222-7503