"IMSCREWS 3/8 x 2-1/2 Heavy-Duty Lag Screws - 304 Stainless Steel (2 pcs)

Extreme Structural Support
Engineered for heavy-duty framing, the 3/8 diameter provides massive shear resistance for critical load-bearing joints. These 2.5-inch bolts are the professional choice for anchoring standard 2x lumber (1.5 thick) to 4x4 or 6x6 posts, ensuring deep penetration and a rock-solid foundation for deck railings, stair stringers, and structural brackets.

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 beam. This clamping effect ensures a gap-free, high-tension joint, eliminating the bridging effect where boards remain loose—a common failure point with full-thread screws.

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 corrosion streaks and maintains structural integrity on high-value cedar, redwood, or premium deck framing.

FAQ
¡ñ Tools: Fits a standard 9/16 hex socket or wrench.
¡ñ Pre-drilling: Required for 3/8 bolts. Use a 1/4 bit for softwoods or 5/16 bit for hardwoods to prevent timber splitting.
¡ñ Why 2-1/2 length? Optimized for passing through 1.5 timber with a deep 1 thread anchor in the base post for maximum stability.

Specs:
- Size: 3/8 x 2-1/2
- Thread: Partially Threaded (Max Clamping)
- Material: 304 Stainless Steel
- Drive: 9/16 Hex Head
- Qty: 2 pcs"

Key Features

• Structural Mounting Strength: The 3/8 diameter provides high shear resistance for structural applications. At 2.5 inches long, these screws are ideal for attaching 2x lumber to 4x posts or securing heavy brackets to structural timber.
• 304 Stainless Steel: Made from premium 18-8 (304) Stainless Steel, providing effective protection against rust and corrosion. Compatible with ACQ pressure-treated lumber in outdoor or humid environments.
• Partial Thread Clamping: The partially threaded shank allows the bolt to pull the outer board or metal plate flush against the support structure, reducing gaps between surfaces for a firm structural joint.
• Outdoor Durability: These fasteners help maintain the appearance of premium wood like cedar and redwood by reducing the likelihood of rust streaks common with standard zinc-plated hardware.
• Professional Installation: Designed for use with a standard 9/16 hex socket. To prevent wood splitting, pre-drilling a pilot hole (recommended 1/4 for softwoods or 5/16 for hardwoods) is required.

Specifications

• ASIN: B0F21DY6VH
• Internal SKU: IMS0669
• Size: 3/8" x 2-1/2"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 2