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 5960-01-010-3083
NSN 5960-01-293-4536
NSN 5910-01-451-3417
NSN 5915-01-477-2588
NSN 6110-01-128-4708
NSN 5930-01-394-4964
NSN 5895-01-529-4205
NSN 5960-01-395-1164
NSN 5960-00-081-0581
NSN 5990-01-345-1468
NSN 6645-00-527-7258
NSN 5905-00-682-4264