Design mil-dtl-01222 type iii style a or b
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 5910-01-407-5203
NSN 5920-01-431-7617
NSN 5945-01-169-4838
NSN 2925-01-370-6898
NSN 6135-01-422-1440
NSN 5990-01-083-2430
NSN 6150-01-430-2564
NSN 6650-01-506-5636
NSN 5910-01-371-8079
NSN 6685-01-181-3125
NSN 5835-01-138-8622
NSN 6130-01-314-3789