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 5996-00-536-7617
NSN 4140-00-635-9195
NSN 5935-01-261-8827
NSN 5975-01-445-3869
NSN 6610-01-167-8747
NSN 6135-01-017-3001
NSN 5950-00-900-3781
NSN 5965-01-165-7496
NSN 6645-00-912-0248
NSN 4140-00-407-1011
NSN 5996-01-451-3591
NSN 5925-01-411-9736