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 5996-01-428-7813
NSN 5990-01-278-8212
NSN 5960-01-472-5263
NSN 5895-00-170-4568
NSN 5998-01-406-3424
NSN 5965-01-148-4979
NSN 5925-00-561-0677
NSN 5895-01-530-2602
NSN 6650-00-754-2276
NSN 6110-01-575-5628
NSN 6110-00-614-8573
NSN 6150-01-581-2376