GRK RSS™ 5/16" x 3-1/8" Grade C Yellow Zinc Washer Head Structural Screw - 1 Count

RSS™ rugged structural screws is a line of screws made of an extremely high-quality carbon steet that provides high tensile torque and shea strength. No pre-drilling is required! It is a lag bolt alternative but with superior strength at a fraction of the installation time.