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 5930-00-388-6758
NSN 6320-01-279-0343
NSN 5925-00-422-0688
NSN 5855-00-586-6255
NSN 6685-01-340-9435
NSN 6220-00-535-3230
NSN 5835-00-757-3558
NSN 6220-01-439-3490
NSN 6150-01-223-4077
NSN 5895-01-172-8078
NSN 6150-01-572-3984
NSN 5935-01-161-3385