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 5910-00-562-3725
NSN 5998-01-234-8163
NSN 5855-01-125-4768
NSN 5950-01-414-6930
NSN 5925-01-445-0850
NSN 5996-01-074-9603
NSN 7035-00-205-1932
NSN 5999-00-941-6522
NSN 6645-01-406-6077
NSN 7035-01-055-1696
NSN 6135-00-574-1204
NSN 6145-01-618-7888