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 6645-00-847-3727
NSN 5999-00-929-5846
NSN 6320-01-466-4175
NSN 6650-01-164-7651
NSN 5998-00-398-9639
NSN 6145-01-154-0256
NSN 5895-01-472-9515
NSN 6320-00-194-4252
NSN 5975-01-072-9647
NSN 7035-01-368-4801
NSN 5905-00-269-5452
NSN 5998-01-046-5259