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 5905-00-161-0633
NSN 5910-01-476-0529
NSN 5985-01-578-6915
NSN 5855-00-832-7316
NSN 5855-00-310-2740
NSN 6145-00-493-4089
NSN 6220-01-270-5118
NSN 5930-00-010-0386
NSN 4140-01-292-5443
NSN 5935-01-365-7452
NSN 5895-01-016-0552
NSN 5960-00-222-7772