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 5945-00-204-9949
NSN 5999-01-357-0445
NSN 6650-01-226-2397
NSN 6685-01-444-0582
NSN 6110-01-512-3212
NSN 4140-00-045-8117
NSN 6145-01-535-1664
NSN 5985-01-289-9945
NSN 2925-01-194-2484
NSN 6240-01-489-0961
NSN 6610-00-134-4902
NSN 6620-00-565-9793