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 5920-01-012-6203
NSN 6320-00-937-5625
NSN 6650-01-333-6641
NSN 5930-01-382-9642
NSN 6220-01-352-5425
NSN 5930-00-941-8348
NSN 6110-00-078-8565
NSN 6130-01-384-3977
NSN 5998-01-440-8859
NSN 5945-00-615-9218
NSN 5990-00-283-1324
NSN 5855-01-442-8781