GRK 10221 UberGrade Rugged Structural Screw, 5/16" x 3-1/8", 500-Count In Stock Large spindle lock-provides easy disc

Large spindle lock-provides easy disc changes

A bit for every job

shed or remote cottage anywhere

Machined aluminum cutting head

GRK 10221 UberGrade Rugged Structural Screw, 5/16" x 3-1/8", 500-Count In Stock Large spindle lock-provides easy discGRK'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