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 6150-01-023-1516
NSN 6645-01-626-9782
NSN 5915-01-518-0685
NSN 5930-01-543-2961
NSN 6130-01-262-8721
NSN 7035-01-022-5763
NSN 5905-00-376-9925
NSN 5855-01-495-2670
NSN 6130-00-023-7255
NSN 7035-00-008-4173
NSN 6145-01-406-5051
NSN 6110-00-170-6520