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 5998-01-177-3214
NSN 5930-01-224-3655
NSN 5985-00-121-9844
NSN 5920-00-711-0767
NSN 6650-01-541-4357
NSN 5925-01-629-6145
NSN 5996-00-123-4826
NSN 5999-01-164-3609
NSN 6105-01-069-2911
NSN 5950-01-484-7845
NSN 5996-01-130-6504
NSN 4140-01-658-2793