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 5990-00-473-1809
NSN 6145-01-014-2670
NSN 5975-00-296-3337
NSN 5975-01-382-5787
NSN 6105-01-414-7824
NSN 6240-00-956-1428
NSN 6145-01-464-1920
NSN 6645-01-107-2152
NSN 6145-01-634-0388
NSN 5835-01-314-2781
NSN 6220-01-602-3630
NSN 6105-01-565-1443