IMSCREWS 1/2" x 4" Heavy-Duty Hex Head Lag Screws - 304 Stainless Steel (2 PCS)

Heavy-Duty Industrial Anchoring
The 1/2" diameter provides substantial shear resistance for industrial and marine timber projects. At 4 inches in length, these fasteners are specifically engineered for high-load applications such as dock construction, heavy timber framing, and securing ledger boards to structural supports.

304 Stainless Corrosion Protection
Manufactured from premium 18-8 (304) stainless steel, offering effective resistance against rust in outdoor, humid, or marine environments. They are compatible with ACQ pressure-treated lumber, helping to maintain structural integrity and prevent rust staining on premium wood surfaces like cedar and redwood.

Partial Thread Clamping Design
The partially threaded shank allows the bolt to pull the outer timber tightly against the support structure. This design facilitates a firm joint by ensuring the threads only engage the base material, helping to eliminate gaps between thick connected timber surfaces for a stable, professional finish.

FAQ
¡ñ Installation Tool: Use with a standard 3/4" hex socket or wrench.
¡ñ Pre-drilling Guide: To prevent timber splitting and ensure a secure fit, pre-drilling a pilot hole is required. Use a 5/16" bit for softwoods or an 11/32" bit for hardwoods.
¡ñ Installation Tip: For smoother installation in dense wood, applying a small amount of lubricant to the threads is recommended. Use low-speed settings to avoid thread galling during high-torque application.

Specs:
- Size: 1/2" x 4"
- Thread: Partially Threaded
- Material: 304 Stainless Steel (18-8)
- Drive: 3/4" Hex Head
- Qty: 2 PCS

Key Features

• ULTIMATE STRUCTURAL HOLD The massive 1/2-inch diameter and 4-inch length provide elite shear resistance for heavy-duty timber framing, deck main beams, and marine hardware.
• ENGINEERED CLAMPING FORCE Featuring a partially threaded design that allows the smooth shank to pass through the outer member, pulling thick timber together with bolt-level clamping force.
• DEEP-CORE 304 PROTECTION Forged from premium 304 (18-8) stainless steel to prevent rust deep within timber. Chemically compatible with ACQ pressure-treated lumber for high-moisture use.
• INDUSTRIAL DRIVE INTERFACE Features an oversized hex head built for 3/4 power sockets. Designed to handle the extreme torque required for deep 4-inch structural penetrations.
• TECHNICAL INSTALLATION To ensure joint integrity and prevent timber splitting, pre-drilling a pilot hole (5/16 for softwoods, 11/32 for hardwoods) is mandatory for this massive 1/2 bolt.

Specifications

• ASIN: B0F21C1K8Y
• Internal SKU: IMS0706
• Size: 1/2" x 4"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 2