The Rexka Hex Head Sems Body Bolt is a high-quality grade 2 bolt, measuring 1/4"-20 x 7/8" and featuring a 3/4" washer O.D. and 7/16" hex. This bolt is finished with zinc and yellow dichromate for durability and corrosion resistance. It is designed to replace Ford's 57030-S36 bolt and is available in a set of 10. With its Unified National Coarse (UNC) thread type and yellow finish, this bolt is perfect for automotive engine cylinder head applications. The exterior finish is Zinc and Yellow Zinc, and the metal type is Zinc. The product type is BOLTS and the item type name is Bolts. The dimensions of the bolt are 0.25 inches in diameter and 0.05 inches pitch.