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 6150-00-452-1086
NSN 5935-01-176-7259
NSN 5965-01-510-8501
NSN 5910-00-499-2570
NSN 5835-01-614-1900
NSN 6650-01-053-8726
NSN 6610-01-146-0331
NSN 6220-00-039-6348
NSN 5999-01-254-3766
NSN 5996-00-383-6173
NSN 6105-00-463-9108
NSN 2925-01-121-0761