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 6145-00-617-4032
NSN 5965-01-385-7813
NSN 6240-01-052-0485
NSN 5915-01-648-7354
NSN 6650-01-506-0386
NSN 5835-01-414-3258
NSN 6145-01-645-4167
NSN 7035-00-445-9657
NSN 5925-01-602-5767
NSN 6105-01-072-9662
NSN 6240-01-263-8190
NSN 5855-01-149-4110