GRK Fasteners RSS 305 Stainless Steel 5/16 x 4 Inch, Structural Outdoor Screws, 400 PCS, Extreme Corrosion Resistant, Pool & Decking Screws, Star Drive Recess, Steel

Product Description Recommended in tropical wood, cedar wood, pool, hot tub, sauna and sea-side applications, as well as deck applications in areas with large daily temperature variances. From the Manufacturer Recommended in tropical wood, cedar wood, pool, hot tub, sauna and sea-side applications, as well as deck applications in areas with large daily temperature variances

• Heavy Duty Lag Screw Alternative: Eliminates pre-drilling in most woods with Zip-Tip technology. Installs 3x faster than traditional lag screws
• ESR-2442 Code Approved For Structural Applications: Engineered for professional-grade connections in heavy duty framing, multi-ply beams, and timber framing. Integrated washer head delivers maximum clamping force for zero-gap joints in LVL, LSL, and engineered lumber.
• Coastal Grade: Rust resistant stainless steel provides extra durability for high moisture environments such as pool decking, docks, boardwalks, etc.
• W-cut Thread Design: Reduces installation torque by 40% for smoother, faster driving. CEE threads minimize splitting in dense hardwoods, engineered lumber, and laminated beams.
• Precision Engineering: Star/Torx drive recess with 6 points of contact prevents stripping and minimizes wobble between screws and bits.