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 5920-00-227-6586
NSN 5835-00-472-6560
NSN 5930-01-352-1471
NSN 6610-01-041-1880
NSN 5998-00-862-6396
NSN 6135-01-623-9063
NSN 6650-01-460-5837
NSN 5895-01-262-4060
NSN 6645-01-294-2479
NSN 6110-00-296-0500
NSN 5960-01-023-8037
NSN 6685-01-412-4005