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 6150-00-971-7079
NSN 6240-01-073-6471
NSN 6130-00-833-7763
NSN 5965-01-006-8613
NSN 7035-01-642-2153
NSN 7035-01-581-9750
NSN 5945-01-627-6696
NSN 6240-01-104-3261
NSN 6685-00-337-0983
NSN 5998-01-210-5894
NSN 6220-01-632-3851
NSN 5945-00-876-4082