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 5895-01-398-9088
NSN 5975-01-379-3035
NSN 6105-00-352-9481
NSN 5975-01-513-1995
NSN 5990-01-633-9503
NSN 6610-00-195-7517
NSN 5999-01-340-9275
NSN 5915-01-356-1361
NSN 6320-00-483-0451
NSN 2925-00-433-5429
NSN 5935-00-738-9485
NSN 5985-01-533-4231