Built for demanding structural and exterior construction applications, the Midwest Fastener SaberDrive™ 52535 lag screw delivers exceptional strength, corrosion resistance, and installation efficiency. As part of the advanced SaberDrive line, this 5/16" x 4" fastener features a high‑performance XL1500 Tan coating, optimized Star Drive geometry, and a large washer head designed to increase holding power across all fastening surfaces.

Whether used for deck framing, heavy timber connections, structural assemblies, or outdoor wood‑to‑wood fastening, this lag screw provides professional‑grade reliability. Its Type‑17 cutting point ensures smooth starts and clean penetration, reducing the need for pre‑drilling and minimizing the risk of splitting. Engineered from high‑strength steel and hardened for durability, the 52535 model is ready to perform in environments where strength and weather resistance are essential.

Key Features

• 5/16" diameter x 4" length, suitable for heavy‑duty structural fastening and deeper anchoring requirements. 
• Large round washer head improves clamping pressure and reduces pull‑through for secure, long‑lasting installations. 
• T‑30 Star Drive provides superior torque transfer, minimizes cam‑out, and delivers smoother driving performance. 
• Type‑17 cutting point eliminates the need for pre‑drilling in most wood types and reduces wood splitting during installation. 
• Premium Tan XL1500 exterior coating protects against moisture, wood acids, and corrosion—ideal for treated lumber and outdoor exposure. 
• Partial thread design maximizes draw‑down force, pulling materials tightly together for structural stability.
• High‑strength alloy steel construction ensures long‑term durability and dependable fastening performance.
• Available in 30‑count packaging, suitable for medium‑ to large‑scale building projects. 

Specifications

• Model: 52535
• Brand: Midwest Fastener / SaberDrive 
• Diameter: 5/16" 
• Length: 4" 
• Material: High‑strength steel / alloy steel 
• Finish / Coating: Tan XL1500 protective exterior coating 
• Head Style: Round washer head, Star Drive (T‑30) 
• Thread Type: Partial thread 
• Point Style: Type‑17 self‑cutting tip 
• Package Quantity: 30 screws 
• Application Class: Construction / structural lag screw 

Applications

This screw is engineered for robust performance across a range of structural and outdoor environments, including:

• Deck framing, ledger boards, and joist anchoring, where long‑term corrosion resistance and high holding strength are essential. 
• Heavy timber connections in framing, beams, and structural builds requiring deeper thread engagement.
• Exterior assemblies, such as pergolas, fencing, and outdoor structural elements exposed to moisture and treated lumber chemicals. 
• General construction and professional carpentry, benefiting from the slip‑free Star Drive, strong clamping force, and self‑starting point.
• DIY structural projects, offering professional‑grade fastening performance with easy installation even for non‑contractors.