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 5950-01-448-9779
NSN 6620-01-258-2570
NSN 6220-01-566-1225
NSN 5990-00-623-8127
NSN 5855-00-149-0766
NSN 7035-01-202-4842
NSN 6685-00-527-7952
NSN 6650-01-552-9344
NSN 6110-00-542-2202
NSN 6620-01-562-3862
NSN 6610-00-338-7314
NSN 5965-01-127-3890