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 7035-00-938-8289
NSN 5945-01-518-9659
NSN 6105-01-417-4470
NSN 5945-01-415-5835
NSN 5935-00-150-8603
NSN 5905-01-009-9950
NSN 5960-01-170-0234
NSN 6220-00-545-5523
NSN 5910-01-440-7916
NSN 6650-01-433-0837
NSN 6645-00-764-3355
NSN 6620-00-957-1352