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 5965-00-281-0319
NSN 5925-00-302-4637
NSN 5925-00-805-3653
NSN 5996-01-435-5547
NSN 5998-01-406-4591
NSN 6320-00-593-0379
NSN 6135-01-451-2120
NSN 5965-01-432-1452
NSN 5990-00-626-6252
NSN 6105-00-405-5850
NSN 6220-00-229-1346
NSN 2925-01-027-1293