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 6610-01-461-8180
NSN 5945-00-275-7927
NSN 6145-01-315-2402
NSN 6645-01-099-4322
NSN 5935-00-880-6568
NSN 5945-00-736-8474
NSN 5915-01-043-9673
NSN 6105-01-476-7393
NSN 6145-01-350-3532
NSN 5915-01-297-0722
NSN 6620-00-922-1099
NSN 5985-01-621-5390