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 6645-01-571-8578
NSN 5905-01-433-5400
NSN 5998-00-452-9447
NSN 5835-01-027-1828
NSN 2925-01-656-0392
NSN 5920-00-276-8657
NSN 6110-01-459-7236
NSN 5935-01-462-0188
NSN 6650-01-201-2956
NSN 5945-00-900-7284
NSN 5835-01-359-2575
NSN 5835-01-457-7951