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 6240-01-487-6459
NSN 6650-01-038-9079
NSN 4140-01-452-2526
NSN 6145-00-715-5262
NSN 6135-00-548-2765
NSN 5999-00-813-1616
NSN 5999-01-515-4066
NSN 6240-01-556-7096
NSN 7035-01-344-8708
NSN 6105-01-401-5361
NSN 5960-01-054-9639
NSN 2925-01-528-7333