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 6650-01-556-3508
NSN 5935-01-167-7423
NSN 5925-01-634-0664
NSN 5996-01-129-1371
NSN 5905-00-526-9582
NSN 5965-01-521-0584
NSN 6320-01-512-2031
NSN 6685-01-574-1577
NSN 5965-01-067-9280
NSN 5998-00-344-0827
NSN 5960-01-335-5238
NSN 6220-01-099-8561