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 5996-01-629-6223
NSN 6135-00-877-1659
NSN 5965-01-366-5900
NSN 6145-00-187-6405
NSN 2925-01-400-2286
NSN 6240-00-226-0462
NSN 5895-00-843-5418
NSN 5960-01-487-6436
NSN 5996-01-289-0493
NSN 5835-01-495-0595
NSN 6220-01-198-2021
NSN 5935-00-781-2559