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 6320-00-681-1324
NSN 6240-00-104-4662
NSN 5905-01-237-2439
NSN 5975-00-629-1193
NSN 5835-00-393-1996
NSN 6220-00-165-1509
NSN 5998-01-027-1809
NSN 2925-00-759-5465
NSN 5905-01-310-8949
NSN 5996-01-656-2461
NSN 5990-00-451-7630
NSN 6105-01-622-2621