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 5960-01-182-3676
NSN 6645-01-656-6416
NSN 4140-01-192-0497
NSN 6145-01-082-6688
NSN 6105-01-251-2557
NSN 6650-01-053-8726
NSN 6110-00-845-8362
NSN 6645-00-879-1384
NSN 5999-01-360-4742
NSN 5915-00-122-4849
NSN 6135-01-247-5660
NSN 5905-01-004-2719