"IMSCREWS 3/8 x 5 Heavy-Duty Lag Screws - 304 Stainless Steel (5 pcs)

Industrial Reach for Massive Timber Assemblies
Our 5-inch lag bolts are designed for heavy-duty structural applications where standard fasteners fall short. The substantial 3/8 diameter provides maximum shear resistance, making these the ideal choice for anchoring heavy landscape timbers, mounting multi-layered structural beams, or securing thick headers to 6x6 posts.

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 gap-free, rock-solid joint, eliminating the bridging effect common in extra-long full-thread screws for a professional-grade finish.

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. These screws prevent unsightly corrosion streaks and maintain structural integrity on high-value cedar, redwood, or premium structural framing.

FAQ
¡ñ Tools: Fits a standard 9/16 hex socket or wrench.
¡ñ Pre-drilling: Mandatory for this extreme length. Use a 1/4 bit for softwoods or 5/16 bit for hardwoods to prevent timber splitting.
¡ñ Why 5 length? Optimized for passing through 3 or 3.5 thick timber with a deep 1.5 + thread anchor in the base post.

Specs:
- Size: 3/8 x 5
- Thread: Partially Threaded (Max Clamping)
- Material: 304 Stainless Steel
- Drive: 9/16 Hex Head
- Qty: 5 pcs"

Key Features

• ELITE CLAMPING POWER The engineered partial thread allows the shank to bypass thick outer beams, pulling lumber together for a gap-free, rock-solid structural joint.
• DEEP-REACH ANCHORING Strategically sized for penetrating 3.5 posts or multi-layer beams and anchoring deeply into structural cores with 3/8 shear resistance.
• 304 EXTERIOR DEFENSE Forged from premium 304 (18-8) stainless steel to endure deep humid timber cores and prevent rust staining in cedar, redwood, or ACQ lumber.
• STABLE TORQUE DELIVERY Precision hex head ensures a secure 9/16 socket fit, delivering maximum torque for controlled installation in dense hardwoods.
• TECHNICAL SPECIFICATION To ensure safety and prevent splitting, pre-drilling a deep pilot hole (1/4 for softwoods, 9/32 for hardwoods) is mandatory.

Specifications

• ASIN: B0F21B2XQJ
• Internal SKU: IMS0685
• Size: 3/8" x 5"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 5