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 6610-01-533-2935
NSN 6320-01-374-9924
NSN 6150-01-136-7658
NSN 6620-00-466-2314
NSN 5905-01-195-5795
NSN 5920-01-590-0373
NSN 6220-01-175-9052
NSN 5999-01-243-0781
NSN 5935-00-484-1291
NSN 6320-00-433-2773
NSN 6610-00-820-0903
NSN 5935-00-221-3720