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 6685-01-426-3262
NSN 5895-01-178-0523
NSN 5998-00-934-3554
NSN 5965-00-458-7321
NSN 6130-01-463-7402
NSN 5990-00-212-4316
NSN 5945-01-465-1624
NSN 5835-00-147-5062
NSN 4140-00-906-1130
NSN 6220-00-809-6071
NSN 5945-01-142-8050
NSN 5910-00-913-5158