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 6650-01-376-6965
NSN 5915-01-187-1699
NSN 5998-01-191-8637
NSN 6145-01-352-5925
NSN 5975-00-434-6597
NSN 6135-00-161-0746
NSN 6105-01-254-2722
NSN 5925-00-001-7446
NSN 5925-01-272-6110
NSN 6135-01-285-1925
NSN 5950-00-156-6345
NSN 5965-01-559-5612