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 6650-01-116-4650
NSN 6150-01-291-4674
NSN 4140-01-168-8796
NSN 5920-01-364-1866
NSN 5895-01-387-6520
NSN 6150-00-765-8394
NSN 6150-01-149-6377
NSN 5965-01-053-7168
NSN 6130-01-253-4050
NSN 4140-01-144-0387
NSN 5930-01-360-4121
NSN 5935-01-434-3173