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 5998-01-568-3130
NSN 6685-01-422-4241
NSN 4140-00-080-8740
NSN 6135-01-373-2518
NSN 5925-01-231-9509
NSN 5930-01-157-7206
NSN 5920-01-380-3196
NSN 6135-01-495-0933
NSN 5905-01-446-9128
NSN 6220-00-481-6188
NSN 5835-01-328-6626
NSN 6320-01-113-7647