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 6610-00-966-5603
NSN 6135-00-816-9052
NSN 5965-00-230-4162
NSN 5999-00-052-5598
NSN 6240-01-206-4809
NSN 5920-00-294-0753
NSN 6645-00-144-3392
NSN 5915-01-519-2878
NSN 6650-01-169-3885
NSN 5835-01-113-4604
NSN 5996-01-456-0488
NSN 6110-00-244-4907