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 4140-01-550-4627
NSN 6320-01-207-9038
NSN 5975-00-290-4285
NSN 6130-00-482-7440
NSN 5950-01-269-8302
NSN 5935-00-042-7775
NSN 5998-01-348-4154
NSN 5999-01-604-8551
NSN 5920-00-401-7951
NSN 5960-01-127-9061
NSN 6650-01-351-4544
NSN 5855-01-433-7009