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 5999-01-569-6513
NSN 6135-01-201-5858
NSN 6240-00-113-5239
NSN 5945-01-196-5784
NSN 6320-00-115-0883
NSN 6145-01-517-0498
NSN 6650-01-099-6271
NSN 6645-01-366-4344
NSN 5920-00-081-5958
NSN 7035-01-382-4413
NSN 5930-01-371-3678
NSN 5935-00-379-4756