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 6130-01-147-5594
NSN 6610-00-602-6404
NSN 6145-01-360-2789
NSN 5965-00-826-1841
NSN 5935-01-347-7848
NSN 2925-00-115-5857
NSN 6135-01-277-3345
NSN 6105-01-165-5057
NSN 6130-01-385-9317
NSN 6610-01-500-4181
NSN 6240-01-455-5638
NSN 6610-00-567-5984