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 6105-01-552-0210
NSN 6240-00-542-6657
NSN 5855-01-566-1568
NSN 5996-00-388-6552
NSN 5920-01-207-9362
NSN 5910-00-601-6253
NSN 5835-00-054-4607
NSN 5999-01-202-8282
NSN 5915-00-636-9785
NSN 6145-01-498-4726
NSN 5835-00-170-5238
NSN 6150-01-420-6494