Simpson Strong-Tie SDW22300-R50 3" Structural Wood Screw Interior 50ct Product Description Simpson SDW Structural Wood Screws are designed with a shorter thread length to fasten multi-ply members such as trusses, engineered lumber products and solid-sawn lumber. Large washer head provides maximum bearing area and deep 6-lobe recess reduces cam-out. Requires type T-40 bit. Optimal screw lengths provide maximum penetration while preventing the point from protruding out the back member. From the Manufacturer Simpson SDW Structural Wood Screws are designed with a shorter thread length to fasten multi-ply members such as trusses, engineered lumber products and solid-sawn lumber. Large washer head provides maximum bearing area and deep 6-lobe recess reduces cam-out. Requires type T-40 bit. Optimal screw lengths provide maximum penetration while preventing the point from protruding out the back member. Features Type T-40 Bit required with deep 6-lobe recess to prevent cam-out Low-profile heads allow hardware installation to be virtually flush Head is stamped with Simpson Strong Tie Stamp and fastener length for easy identification Bold thread design provides superior holding power and cInches fastened members together for consistent installation 1-7/16-Inch thread length and recommended installation with a low-speed 1/2-Inch drill and T-40 bit, Imported USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.