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 6240-01-461-3629
NSN 6240-00-102-4003
NSN 5925-01-393-7341
NSN 6135-01-167-7604
NSN 5935-01-457-7567
NSN 5920-01-378-2490
NSN 6610-00-456-0485
NSN 5855-00-298-0261
NSN 2925-01-432-6520
NSN 5945-00-269-5375
NSN 5910-00-551-2442
NSN 6110-01-242-0334