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 5905-01-281-6957
NSN 6650-01-421-5879
NSN 6220-01-353-9026
NSN 5999-01-602-9383
NSN 5915-00-428-7405
NSN 5950-01-123-8323
NSN 5985-01-509-2524
NSN 5905-01-391-4983
NSN 5998-00-840-5463
NSN 5935-00-453-3462
NSN 5950-01-012-0612
NSN 6130-00-349-5017