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 5990-00-165-1809
NSN 5945-01-121-7227
NSN 6110-01-520-7387
NSN 5930-01-550-3670
NSN 5960-00-914-3186
NSN 5835-00-779-2836
NSN 6150-01-073-4727
NSN 2925-00-176-3889
NSN 5915-00-764-7489
NSN 2925-01-658-9457
NSN 5975-00-915-5834
NSN 6650-01-160-1110