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 6320-01-573-3215
NSN 6105-01-411-4616
NSN 5998-01-014-5242
NSN 5950-00-894-3904
NSN 6135-01-528-6896
NSN 5975-01-580-7417
NSN 5905-01-298-8082
NSN 6685-01-533-7105
NSN 5835-01-371-8759
NSN 6110-01-616-5822
NSN 6610-00-331-3460
NSN 2925-00-872-4474