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 4140-01-606-4645
NSN 5915-00-361-1136
NSN 6110-01-035-0427
NSN 5910-00-910-8241
NSN 5905-01-148-8443
NSN 6240-00-646-6931
NSN 5925-00-840-7058
NSN 6130-01-214-6704
NSN 6145-01-399-0467
NSN 6150-01-383-0827
NSN 7035-01-492-2376
NSN 5998-01-508-4703