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 6105-01-076-2231
NSN 6240-01-653-9921
NSN 5996-01-476-2131
NSN 6150-01-243-4443
NSN 5999-01-145-8249
NSN 6130-01-397-0951
NSN 5965-01-614-7320
NSN 6150-00-159-5271
NSN 6135-01-100-3593
NSN 6130-01-458-1282
NSN 5935-01-079-4445
NSN 5999-01-463-1884