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 6130-00-855-7498
NSN 6240-00-997-4559
NSN 6645-01-605-1485
NSN 5835-01-123-8305
NSN 2925-00-408-9829
NSN 6130-00-127-8270
NSN 6620-01-476-7355
NSN 6610-01-027-1641
NSN 6240-01-461-9635
NSN 6135-01-534-3007
NSN 5910-01-062-4806
NSN 6105-00-477-4388