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 6645-01-394-5149
NSN 6145-00-136-9132
NSN 6135-01-505-1293
NSN 5910-00-996-9559
NSN 6240-01-251-6621
NSN 5945-01-272-7292
NSN 5998-00-158-6329
NSN 5915-01-604-7376
NSN 5855-01-462-7476
NSN 6650-01-388-2538
NSN 5935-01-634-0668
NSN 6240-01-539-8227