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 5999-00-960-4308
NSN 6320-01-386-3491
NSN 6105-00-842-5402
NSN 6105-01-077-5559
NSN 6620-00-065-9983
NSN 5895-00-065-4441
NSN 6110-00-118-6174
NSN 5855-00-361-0167
NSN 5950-01-335-9576
NSN 5998-01-066-2996
NSN 6650-00-299-1839
NSN 5920-01-257-0062