GRK RSS Rugged Structural Screw with CEE Thread and Climatek Coating (5/16 x 4-Inch)

GRK’s RSS 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. The screws are available in 5/16 by 4-inch size.
Easy to Install Lag Alternative
RSS screws that are 3-1/8-inch and longer have CEE Threads which enlarge the screw hole for the non-threaded portion of the fastener, allowing the wood to settle easily and increases the screw’s drawing strength. The CEE Thread also reduces the friction on the screw shank which can result in lowering the driving torque and the likelihood of splitting the wood. This is why the RSS screw is an efficient lag screw alternative. GRK’s round head with a built-in shield (washer-type head) has no sharp edges like conventional lag screws. The added shoulder (nominal diameter) underneath the washer has the ability to center the RSS screw in pre-drilled hardware like hinges and connector plates.
Advantages
Cutting pockets provide a clean hole, reduces splitting, and bore with precision. Case-hardened steel exists for high tensile, torque, and shear strength. Climatek Coating is AC257 code-approved for use in treated lumber. They are ideal for interior or exterior use carrying beams, ledger boards, stair rails, deck posts, playground equipment, and other professional applications. RSS screws have been evaluated for structural and corrosion resistance to be in compliance with the International Building Code (IBC) and the International Residential Code (IRC). RSS fasteners are industry leaders in strength and corrosion resistance.