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 5905-01-497-6608
NSN 4140-01-147-4764
NSN 6105-01-118-4705
NSN 6620-00-904-2139
NSN 5910-00-738-4534
NSN 6110-01-012-4710
NSN 5920-01-303-6841
NSN 5985-01-289-5243
NSN 5855-01-364-9810
NSN 5999-01-641-8759
NSN 6130-01-576-9618
NSN 6130-00-508-3655