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 6135-01-110-3516
NSN 6150-01-077-7839
NSN 6620-01-459-6401
NSN 5975-00-527-9656
NSN 5998-01-634-0604
NSN 5895-00-410-0080
NSN 6135-01-377-5729
NSN 5950-00-194-9064
NSN 6320-01-454-1965
NSN 6320-00-098-2858
NSN 7035-00-679-9027
NSN 6110-01-495-0599