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 5985-01-656-6522
NSN 6105-00-287-8971
NSN 5835-01-487-3042
NSN 6650-00-175-1342
NSN 5998-00-904-7610
NSN 5930-00-657-4735
NSN 6220-00-696-1519
NSN 5915-01-223-9801
NSN 5910-01-484-1236
NSN 6320-01-445-5893
NSN 6110-01-615-7841
NSN 5945-00-456-0699