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 6645-01-508-0345
NSN 6145-00-248-4944
NSN 5855-01-096-9294
NSN 6685-01-395-4934
NSN 7035-00-104-7613
NSN 5835-01-345-6697
NSN 6620-00-542-1579
NSN 6685-00-754-7495
NSN 6145-01-423-2645
NSN 5950-01-136-3985
NSN 5985-00-422-5337
NSN 5895-01-297-2706