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 6145-01-386-4299
NSN 5835-01-261-9878
NSN 5998-01-654-0895
NSN 6610-00-822-0431
NSN 5855-01-162-5251
NSN 6130-01-051-2594
NSN 4140-01-202-5600
NSN 5996-00-726-4785
NSN 6240-01-224-7656
NSN 2925-00-728-8118
NSN 5985-00-552-0415
NSN 5965-00-928-6983