Rss 12221 Structural Screws, 5/16 In X 3-1/8 In, Star Drive, 100-pack

GRK Fasteners RSS structural screws are heavy-duty fasteners engineered for demanding construction and outdoor projects where superior strength and corrosion resistance are essential. Made from specially hardened steel, these screws deliver exceptional tensile, torque, and shear strength, making them an efficient alternative to traditional lag screws for applications like deck construction, stair rail installation, and ledger board fastening.

The innovative design features sharp threads and points that bite instantly into materials, including hardwood, while reducing the splitting effect through smaller shanks. At 3-1/8 inches and longer, these screws include CEE threads that enlarge the screw hole for the non-threaded portion, allowing wood to settle easily and increasing drawing strength. The CEE thread design also reduces friction on the screw shank, lowering driving torque and the likelihood of wood splitting.

Features and Benefits

• Washer Head Design: The round head with built-in washer shield creates zero-gap joints that draw two substrates together securely. The added shoulder underneath centers the screw in pre-drilled hardware like hinges and connector plates, eliminating sharp edges found on conventional lag screws.
• Climatek Coating: A durable corrosion-resistant finish makes these screws suitable for both interior and exterior applications, providing long-lasting protection against the elements.
• Sharp Point and Threads: The sharp point and threads bite instantly into materials, including hardwood, reducing the splitting effect due to smaller shanks.
• CEE Thread Technology: Enlarge screw holes for the non-threaded portion, reducing friction and driving torque while increasing the fastener's drawing strength and wood settlement.
• Efficient Lag Screw Alternative: The combination of design features makes this screw perform efficiently compared to traditional lag screws.

Specifications

• Brand: GRK Fasteners
• Model: RSS 12221
• Thread Size: 5/16 inch
• Length: 3-1/8 inches
• Head Type: Washer head
• Drive Type: Star drive
• Material: Specially hardened steel
• Coating: Climatek corrosion-resistant finish
• Pack Quantity: 100 screws