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 5920-01-413-3887
NSN 6145-01-178-9265
NSN 5930-01-032-4502
NSN 5895-01-062-5359
NSN 5998-01-599-5776
NSN 6685-01-586-4565
NSN 6135-01-231-4809
NSN 5950-00-324-1179
NSN 5910-00-459-2173
NSN 6645-01-179-0243
NSN 5925-01-515-1378
NSN 5996-00-538-2239