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 7035-01-383-6549
NSN 4140-01-419-8592
NSN 5920-01-347-0728
NSN 5905-01-650-1845
NSN 6105-00-140-7528
NSN 5905-01-127-4930
NSN 4140-01-258-6685
NSN 6110-01-032-5075
NSN 6610-01-177-5033
NSN 5835-00-594-4921
NSN 5895-01-508-2860
NSN 6150-01-525-7961