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 5905-01-133-4832
NSN 5999-00-020-0099
NSN 5920-01-366-4543
NSN 5835-00-523-0736
NSN 6645-01-089-5522
NSN 6145-00-980-5638
NSN 6320-01-166-3602
NSN 6645-00-608-7756
NSN 6645-01-557-8134
NSN 5935-00-148-8381
NSN 5996-00-172-6622
NSN 6220-00-436-7570