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 6320-01-173-7950
NSN 5945-01-504-0708
NSN 7035-00-420-1310
NSN 5915-01-466-1899
NSN 5965-01-449-1101
NSN 6145-00-938-6085
NSN 5895-01-429-1029
NSN 6620-01-447-6666
NSN 6135-01-260-7180
NSN 5905-01-337-2294
NSN 5985-00-883-3308
NSN 5835-01-525-3220