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 6645-00-292-5053
NSN 5965-01-046-9619
NSN 5950-01-106-1733
NSN 5990-00-707-0731
NSN 6150-00-789-3738
NSN 5910-01-382-3308
NSN 5975-00-636-4910
NSN 5990-00-888-0718
NSN 5998-01-576-0391
NSN 6620-01-378-5579
NSN 6105-00-837-4135
NSN 5930-01-392-8409