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 6320-00-731-6134
NSN 5925-00-938-7370
NSN 5910-01-579-3434
NSN 5915-01-445-6577
NSN 5960-00-072-5874
NSN 5985-01-341-0900
NSN 6110-01-529-8817
NSN 6145-00-170-7947
NSN 5895-00-758-4479
NSN 5965-01-344-8592
NSN 5910-00-241-0474
NSN 6240-01-593-2170