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 6610-01-580-3272
NSN 6240-01-447-8088
NSN 6240-01-630-2697
NSN 5910-01-620-9478
NSN 6650-01-506-5636
NSN 6150-01-505-8168
NSN 6650-01-099-1422
NSN 5835-01-104-5707
NSN 6650-01-449-1413
NSN 7035-00-337-8745
NSN 6650-00-269-5000
NSN 5835-00-025-9951