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 6150-01-622-6092
NSN 5998-00-217-2162
NSN 6620-01-421-6949
NSN 6650-01-592-2445
NSN 6650-01-239-6241
NSN 5950-00-201-5110
NSN 6135-01-282-4326
NSN 5990-00-566-5987
NSN 6240-01-151-7613
NSN 5990-01-263-0362
NSN 5915-00-774-3716
NSN 6110-01-531-6861