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 5965-01-484-2743
NSN 5895-00-320-8970
NSN 5835-01-345-3718
NSN 5945-01-199-0269
NSN 6620-01-352-5640
NSN 6135-01-238-2878
NSN 5925-01-522-0109
NSN 4140-00-192-3811
NSN 5920-00-759-1003
NSN 6240-00-299-9819
NSN 6240-00-433-7706
NSN 6220-01-168-7773