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 6105-01-573-9515
NSN 5999-01-558-8191
NSN 6105-01-170-2638
NSN 6650-01-642-6773
NSN 6110-01-153-2290
NSN 6645-00-819-5045
NSN 5910-00-080-0041
NSN 5915-01-081-7102
NSN 6645-01-569-5729
NSN 6130-01-407-4695
NSN 5998-00-517-9170
NSN 6320-00-831-2227