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 6650-00-283-0978
NSN 7035-00-849-5526
NSN 5990-00-027-5689
NSN 6135-00-826-4798
NSN 6645-00-819-5045
NSN 5935-01-263-3928
NSN 6135-01-545-6582
NSN 5910-00-314-7102
NSN 5990-01-140-5497
NSN 5895-01-499-2116
NSN 6110-00-611-1111
NSN 6610-01-168-7943