GRK’s RSS Rugged Structural Screw is made out of Climate coated and hardened steel. Its sharp threads and point bite instantly into any wood product (including hardwood), reducing the splitting effect caused by smaller shanks. There are no sharp edges on its washer type head like conventional lag screws.

The RSS screw is made of specially hardened steel to provide you with torque, high tensile, and shear strength. 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. It also increases the screw’s drawing strength. It is the CEE thread that works to reduce the likelihood of splitting the wood and reduce the friction on the screw shank that can result in lowering the driving torque.

Our round head with built-in shield (washer type head) has no sharp edges such as on conventional lag screws. The added shoulder (nominal diameter) underneath the washer has the ability to center the RSS screw in pre-drilled hardware like connector plates and hinges. Short lengths of the RSS may also be used to install wire diamond mesh for stucco buildings.

The RSS Rugged Structural screw is the only lag screw replacement of its kind.