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 5915-00-170-6775
NSN 6320-01-158-2177
NSN 5905-01-231-8791
NSN 5990-00-296-4825
NSN 6685-00-379-4652
NSN 6150-01-024-2980
NSN 5915-00-733-7439
NSN 5945-00-505-5984
NSN 6220-00-508-9155
NSN 5985-01-058-8036
NSN 6135-00-686-4777
NSN 5930-00-155-8119