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 5905-00-700-0776
NSN 5915-00-934-3446
NSN 6145-00-233-7473
NSN 6135-00-223-9563
NSN 5935-00-100-0101
NSN 6110-01-463-3395
NSN 6685-01-207-6736
NSN 5835-01-329-4814
NSN 6220-01-085-4947
NSN 5835-00-554-0399
NSN 6110-01-359-8715
NSN 2925-01-439-4451