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 6135-01-056-4609
NSN 5935-00-229-8991
NSN 6650-01-081-1537
NSN 6685-01-355-4539
NSN 5910-01-578-4575
NSN 5975-00-088-9947
NSN 6110-01-406-3623
NSN 5990-01-161-4625
NSN 4140-01-133-6446
NSN 6150-01-566-1010
NSN 5855-01-243-2355
NSN 6110-00-598-2574