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 4140-01-621-9474
NSN 5998-01-258-0556
NSN 5985-01-517-3462
NSN 5985-00-040-0412
NSN 5910-01-658-1958
NSN 6145-01-157-2042
NSN 5930-00-392-5587
NSN 6650-00-792-8577
NSN 6145-01-014-5209
NSN 5915-01-091-9568
NSN 5915-01-113-7872
NSN 2925-00-233-5644