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 5945-01-139-5179
NSN 5905-00-655-9282
NSN 5905-00-256-7778
NSN 6220-01-116-2411
NSN 5960-01-449-1310
NSN 6620-00-193-9503
NSN 2925-01-118-6125
NSN 5905-01-360-1441
NSN 6110-01-503-1552
NSN 6110-01-546-5645
NSN 5990-01-328-9846
NSN 5925-01-349-3081