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 6610-00-382-0266
NSN 5985-00-291-1140
NSN 5985-00-401-7230
NSN 4140-01-088-1898
NSN 6130-01-165-2130
NSN 6105-00-026-8026
NSN 2925-01-052-0636
NSN 5965-00-246-5612
NSN 6105-00-099-0068
NSN 6220-01-301-1349
NSN 5905-01-310-5999
NSN 6620-00-231-8100