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 6220-00-070-7878
NSN 5945-01-349-5690
NSN 5835-01-574-0080
NSN 7035-00-088-7355
NSN 5930-01-485-3958
NSN 5999-01-231-4256
NSN 5835-01-426-6573
NSN 6685-01-541-3722
NSN 5920-01-523-4894
NSN 6685-01-080-6045
NSN 6610-01-522-3345
NSN 6320-01-162-5977