9/16" x 2.90" Shackle bolt with 7/16"-20 threads with nuts. For use with spring hanger brackets and equilizers. Fluting prevents the bolt from turning, which can wear hanger brackets.
Heavy 1/4" steel with new strong design to distribute load, preventing undue stress to axles or mobile home frame. Uses 1/2" or 9/16" dia. shackle bolts. A = 5-5/8", B = 2-13/16", C = 9/16", D = 9/16".