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 5999-01-616-0095
NSN 6620-01-242-8366
NSN 6650-00-244-5648
NSN 5999-01-605-1486
NSN 5920-01-550-7167
NSN 5855-01-432-0524
NSN 6685-01-450-3479
NSN 6620-01-654-9436
NSN 5985-01-394-5373
NSN 5975-01-096-8149
NSN 5855-01-035-2866
NSN 5998-01-322-8579