"IMSCREWS 1/2"" x 3-1/2"" Heavy-Duty Lag Screws - 304 Stainless Steel (10 PCS)

Extreme Structural Anchoring
When your build requires the highest level of stability, these 1/2"" diameter lag bolts deliver industrial-grade shear strength. The 3.5-inch length is specifically designed for deep-core anchoring, making these the professional choice for securing heavy timber beams, ledger boards, or structural posts in large-scale outdoor projects.

Vise-Like Clamping Power
Our partially threaded shank features a smooth upper section that allows the bolt to pull the outer timber tightly against the support structure. This ""clamping effect"" creates a high-tension, gap-free joint, eliminating the ""bridging"" effect common in long full-thread screws and ensuring a rock-solid structural connection.

304 Stainless Weather Protection
Forged from premium 18-8 (304) stainless steel for elite rust protection in outdoor and humid environments. compatible with ACQ pressure-treated lumber. Prevents unsightly rust streaks and maintains structural safety on high-value cedar, redwood, or premium structural framing.

FAQ
¡ñ Tools: Fits a standard 3/4"" hex socket or wrench.
¡ñ Pre-drilling: Mandatory for this diameter and length. Use a 5/16"" bit for softwoods or 3/8"" bit for hardwoods to prevent timber splitting while ensuring maximum thread bite.
¡ñ Why 3-1/2"" length? Perfect for passing through 1.5"" or 2"" thick timber with a massive 1.5""+ thread anchor in the base post for maximum pull-out resistance.

Specs:
- Size: 1/2"" x 3-1/2""
- Thread: Partially Threaded (Max Clamping)
- Material: 304 Stainless Steel
- Drive: 3/4"" Hex Head
- Qty: 10 PCS"

Key Features

• [ULTIMATE LOAD CAPACITY] Featuring a massive 1/2" industrial diameter, these bolts provide superior shear resistance for heavy-duty timber frames and structural nodes.
• [ELITE CLAMPING POWER] The strategic partial thread design allows the smooth shank to bypass the outer member, drawing substrates together for a gap-free, rock-solid joint.
• [304 EXTERIOR SHIELD] Forged from premium 304 (18-8) stainless steel to prevent rust and corrosion in marine environments or ACQ pressure-treated lumber.
• [MAX-TORQUE HEX HEAD] Heavy-duty hex head fits standard 3/4" socket drives, delivering maximum torque transfer for secure installation in dense timber.
• [TECHNICAL SPECIFICATION] To ensure safety and prevent splitting, pre-drilling a deep pilot hole (5/16" for softwoods, 3/8" for hardwoods) is mandatory for this oversized diameter.

Specifications

• ASIN: B0F21D3WZP
• Internal SKU: IMS0704
• Size: 1/2" x 3-1/2"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 10