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 5835-00-413-4701
NSN 6145-01-305-1518
NSN 6150-00-636-8938
NSN 5920-01-209-6368
NSN 5965-01-467-2071
NSN 5915-01-622-5561
NSN 6320-01-431-4359
NSN 5999-01-108-1718
NSN 5855-00-058-1293
NSN 5905-00-170-7161
NSN 6135-01-513-3581
NSN 6130-01-426-6859