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 6320-01-344-6511
NSN 5996-01-493-7962
NSN 6130-01-416-2080
NSN 5835-01-262-6561
NSN 6150-01-443-3662
NSN 5975-01-519-8899
NSN 6110-01-378-5951
NSN 5910-01-085-4515
NSN 5930-01-088-6712
NSN 5945-01-082-0911
NSN 6685-01-535-1955
NSN 5935-01-227-8280