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 6220-00-010-1595
NSN 6220-00-141-0268
NSN 5965-00-678-8725
NSN 5999-01-645-2722
NSN 2925-00-156-6615
NSN 6650-01-200-3293
NSN 5950-00-234-4406
NSN 6110-00-195-2202
NSN 5905-00-258-1183
NSN 6105-00-834-7901
NSN 5998-00-017-2828
NSN 6220-00-852-0367