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 6240-00-334-6766
NSN 6130-01-446-3773
NSN 5905-01-310-4552
NSN 5999-01-016-5666
NSN 5990-00-014-2310
NSN 6650-00-202-4540
NSN 5895-01-051-0450
NSN 5935-01-260-9476
NSN 6610-01-191-5214
NSN 5965-01-557-2862
NSN 5945-01-016-0424
NSN 6105-01-146-2099