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 4140-01-258-6685
NSN 5996-00-148-8474
NSN 5835-01-219-0586
NSN 5960-01-328-8248
NSN 5905-01-111-7808
NSN 6610-00-151-8074
NSN 6320-00-284-1524
NSN 6320-01-098-2503
NSN 5975-01-347-8956
NSN 5905-01-486-5911
NSN 5855-01-503-1495
NSN 6610-01-149-4753