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 6135-01-175-4589
NSN 6110-01-570-1618
NSN 7035-01-140-5942
NSN 5999-01-069-2594
NSN 6650-01-115-7981
NSN 2925-01-424-0235
NSN 4140-01-503-1420
NSN 5945-01-356-4135
NSN 5935-01-411-6300
NSN 5925-00-539-8372
NSN 5835-01-364-6830
NSN 6240-01-039-8217