GRK 10221 UberGrade Rugged Structural Screw, 5/16" x 3-1/8", 500-Count BF15 Not for overhead use

Not for overhead use

Size : 6-1/2" - 8"

Heavy-duty extruded aluminum blade and head with a clear (silver) anodized finish

Faces are replaceable durable plastic that won’t mar finely finished surfaces

full measure and thickness

GRK 10221 UberGrade Rugged Structural Screw, 5/16" x 3-1/8", 500-Count BF15 Not for overhead useGRK's RSS Rugged Structural Screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. The sharp threads and points bite instantly into the material (including hardwood), reducing the splitting effect due to smaller shanks. RSS screws which are 3 1 8" and longer have a six threaded CEE thread that enlarges the screw hole for the non threaded portion of the fastener, allowing the wood to settle easily and