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 6220-00-647-1456
NSN 5965-01-499-1528
NSN 6150-01-519-2182
NSN 6105-01-013-9252
NSN 5965-00-129-9779
NSN 6240-01-358-0064
NSN 6105-01-542-6846
NSN 6105-01-029-3764
NSN 5960-00-827-1201
NSN 6145-01-432-9220
NSN 6320-01-103-6218
NSN 5925-00-017-9718