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 5910-01-219-6978
NSN 5998-00-175-1346
NSN 5965-01-175-9133
NSN 5905-01-558-7995
NSN 5915-01-303-6641
NSN 5960-00-246-4623
NSN 4140-01-505-2177
NSN 5835-00-863-0959
NSN 6105-00-099-8818
NSN 6145-01-515-2025
NSN 6130-01-116-1042
NSN 2925-01-394-5650