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 6145-00-097-9437
NSN 5910-00-084-0275
NSN 5855-00-127-5559
NSN 5990-00-369-5212
NSN 5935-01-291-1133
NSN 6105-00-602-0930
NSN 5855-01-191-3404
NSN 5945-01-420-8509
NSN 5835-01-601-4411
NSN 4140-01-420-6263
NSN 5975-01-258-8013
NSN 5935-01-389-3097