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 6220-01-369-3766
NSN 5920-01-104-4332
NSN 5910-00-947-6484
NSN 5999-00-173-2302
NSN 6145-01-153-7197
NSN 6145-01-200-7075
NSN 6150-00-614-9568
NSN 6130-01-047-4925
NSN 5855-00-256-5562
NSN 5855-01-208-1471
NSN 6130-01-411-5929
NSN 5930-01-392-3820