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 6240-01-255-8961
NSN 6320-00-405-2348
NSN 5960-00-755-7017
NSN 5915-01-579-2093
NSN 5930-00-089-8022
NSN 5925-01-406-3490
NSN 5910-01-160-7848
NSN 6110-01-125-6654
NSN 6145-01-532-0414
NSN 5998-01-085-8508
NSN 5999-01-518-6577
NSN 5895-01-130-1617