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 5985-01-157-5190
NSN 6610-01-545-2970
NSN 5960-00-511-8199
NSN 6650-01-530-8609
NSN 5975-00-065-8289
NSN 5975-01-068-3705
NSN 5990-00-170-4239
NSN 5985-00-406-0499
NSN 5915-00-835-6479
NSN 5925-01-607-6563
NSN 6240-01-363-6152
NSN 5935-00-837-5216