The Dorman 803-535 Cap Screw is a grade 5 hex head fastener made by Dorman/AutoGrade. This screws are 9/16 inches in diameter and 3-1/2 inches in length, perfect for various automotive and industrial applications. With a 1-year replacement warranty, you can be confident in the quality and durability of this product. Additionally, it is important to note that this product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.