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 6645-01-368-8284
NSN 6610-01-168-2051
NSN 6110-01-121-7380
NSN 6220-01-492-0563
NSN 5895-00-672-1772
NSN 5930-00-126-5046
NSN 5920-01-347-0728
NSN 6610-01-490-2020
NSN 6130-01-521-0344
NSN 6320-01-232-4664
NSN 5996-00-866-1356
NSN 5905-01-500-0831