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 5910-00-100-5784
NSN 7035-01-463-9855
NSN 5945-00-539-6834
NSN 6650-01-047-9214
NSN 5925-00-465-4534
NSN 5965-01-608-6037
NSN 5925-01-077-3137
NSN 5998-01-266-8090
NSN 6650-01-154-1870
NSN 5960-01-366-6246
NSN 6145-01-441-4239
NSN 2925-01-203-0493