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 6645-00-404-1785
NSN 6240-01-147-0379
NSN 6320-01-436-0513
NSN 5935-01-634-0668
NSN 6105-01-589-4242
NSN 5945-01-146-4529
NSN 6685-01-420-0410
NSN 6320-00-468-8421
NSN 5905-01-141-6633
NSN 5930-00-908-6932
NSN 5975-01-326-5580
NSN 6320-01-607-1491