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 5920-01-595-5207
NSN 5910-01-303-6055
NSN 6130-01-449-1868
NSN 6240-00-099-8606
NSN 5945-01-172-6633
NSN 6610-00-144-7036
NSN 6220-01-462-0236
NSN 6110-01-446-0135
NSN 5925-01-029-3483
NSN 5950-01-545-2514
NSN 5930-01-416-4268
NSN 6105-01-503-0391