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 6135-00-168-9352
NSN 6145-01-551-2554
NSN 6240-01-195-8696
NSN 5960-00-158-4841
NSN 6110-01-640-6880
NSN 5920-01-292-2570
NSN 6220-01-472-2284
NSN 5915-01-044-5260
NSN 5945-01-068-6752
NSN 5960-01-593-4760
NSN 6105-01-547-2707
NSN 6240-01-042-3650