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 5895-01-422-1041
NSN 5915-01-464-0454
NSN 5925-01-559-0243
NSN 5996-00-247-3808
NSN 6220-00-819-9325
NSN 6105-01-428-9648
NSN 5990-00-649-8352
NSN 5965-00-201-7479
NSN 5910-01-552-6266
NSN 6220-01-154-8368
NSN 5935-01-359-2065
NSN 6620-00-753-0745