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 5935-00-647-4020
NSN 6220-01-151-7037
NSN 5996-01-180-5834
NSN 6620-01-633-8443
NSN 2925-01-076-6128
NSN 6240-01-660-5662
NSN 6145-01-624-3795
NSN 6685-01-409-2748
NSN 5998-00-895-6571
NSN 5920-01-338-9974
NSN 5935-01-642-7839
NSN 5920-00-103-7642