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 5915-01-140-9767
NSN 6130-01-134-8213
NSN 5855-00-055-1579
NSN 6145-01-565-5595
NSN 6105-01-009-6177
NSN 6130-01-094-2735
NSN 6130-01-461-2039
NSN 5975-01-172-0435
NSN 6620-01-149-9192
NSN 6650-01-415-5573
NSN 5950-01-455-3133
NSN 6145-01-462-2460