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 6130-01-284-4452
NSN 5945-00-741-3711
NSN 5999-01-426-8327
NSN 6135-01-163-0332
NSN 6220-00-758-1788
NSN 5965-01-459-8203
NSN 5905-01-340-9046
NSN 6650-01-221-0034
NSN 5930-01-153-2667
NSN 2925-01-454-2046
NSN 7035-00-153-3826
NSN 5998-00-320-8350