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GRK Fasteners RSS™ 305 Stainless Steel 5/16 x 3-1/8 Inch, Structural Outdoor Screws, 500 PCS, Extreme Corrosion Resistant Climatek™ Coating, Pool & Decking Screws, Coastal Structure Applications, Fast
✅ In stock
📉 Price recently dropped
D
Grade
Analysis Confidence
100%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
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Price verified Sep 25, 2026 8:28 PM · Prices & availability subject to change
Is This a Good Price on Amazon?
😐 Weak Deal- 😐Verdict: Weak Deal. Marginal discount. Prices may drop further soon.
- 💰At 9% off its standard going rate, this offer delivers clear value for the money.
- 📉It has been quite a while since a more competitive price was available, lending today's offer solid comparative value.
- 📈The direction is downward at the moment; if that holds, an even better price may surface — though timing the market is never certain.
How We Scored This Deal
Price Competitiveness
10.43/28
Recent Value
4.62/22
Market Standing
13.52/20
Deal Strength
0/20
Momentum
10/10
📝 Product Overview
🚚 Shipping
Free Shipping
Product Details
✓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.
⚙️ Specifications
Material
Stainless Steel 305
Head Style
Round
Item dimensions L x W x H
10 x 9 x 12 inches
Exterior Finish
Silver
Thread Size
5/16"
Item Dimensions
10 x 9 x 12 inches
Item Weight
16.7 pounds
Thread Coverage
Partially Threaded
Fastener Size
5/16" x 3-1/8"
Size Name
5/16" x 3-1/8"
Number of Pieces
500
