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 6610-01-003-9763
NSN 5920-01-418-0863
NSN 6645-00-296-8310
NSN 6135-01-384-4395
NSN 5945-01-112-0190
NSN 6650-01-364-1313
NSN 6150-01-145-5156
NSN 5945-01-194-7329
NSN 5975-01-575-1364
NSN 4140-01-105-6828
NSN 5999-01-478-6885
NSN 5920-00-594-3124