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 6220-00-802-6776
NSN 5990-00-923-3837
NSN 7035-01-506-6442
NSN 6145-01-383-4630
NSN 2925-00-246-3077
NSN 6240-01-401-5340
NSN 5965-01-136-5657
NSN 5930-00-580-1665
NSN 6105-01-597-0043
NSN 6685-00-663-9000
NSN 5925-00-386-8532
NSN 4140-01-021-2818