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 6685-01-629-8317
NSN 6105-00-263-6385
NSN 5925-01-514-3559
NSN 5975-00-574-9727
NSN 5990-01-605-4769
NSN 6240-01-618-1978
NSN 5960-00-839-1529
NSN 5998-00-820-3874
NSN 7035-00-238-3662
NSN 5935-01-300-8531
NSN 5855-01-064-8961
NSN 5855-00-560-0110