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 5935-00-303-5465
NSN 6610-01-442-3509
NSN 5998-00-605-6965
NSN 5920-00-901-1551
NSN 5895-00-186-2232
NSN 6130-00-309-2388
NSN 6685-00-581-2688
NSN 5998-01-433-2308
NSN 5895-01-353-5604
NSN 5895-01-641-2716
NSN 5935-01-328-5478
NSN 5990-00-412-4411