3/8-16 X 1/2" Threaded 1018 Steel Bung Made in the U.S.A. from domestic material - very high quality. Specs: Threaded I.D. 3/8-16, O.D. 3/4", Length 1/2" Material: 1018 Steel Speed Dealer is your #1 source for builder parts on the web. Many uses: mount fenders, gas tanks, sissy bars, motor mount, pipes, seats, oil bags, license plate brackets.