"IMSCREWS 5/16 x 2-1/2 Heavy-Duty Lag Screws - 304 Stainless Steel (10 pcs)

Heavy-Duty Structural Anchoring
The 5/16 diameter offers industrial-grade shear strength for critical load-bearing joints. This 10-piece pack is the professional choice for joining standard 2x lumber (1.5 thick) to 4x posts, providing deep penetration and a rock-solid connection for deck railings, gate frames, and pergolas.

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 joint, eliminating the bridging effect where boards remain loose—a common issue with long full-thread screws.

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

FAQ
¡ñ Tools: Fits a standard 1/2 hex socket or wrench.
¡ñ Pre-drilling: Recommended. Use a 3/16 bit for softwoods or 7/32 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: 5/16 x 2-1/2
- Thread: Partially Threaded (Max Clamping)
- Material: 304 Stainless Steel
- Drive: 1/2 Hex Head
- Qty: 10 pcs"

Key Features

• POWERFUL COMPRESSION LOCK The engineered partial thread allows the smooth shank to bypass the outer beam, pulling timber together for a rock-solid, gap-free joint.
• ENGINEERED FOR 2x LUMBER At 2.5 long, these bolts provide the perfect depth for securing standard 1.5 thick lumber to structural posts with maximum fiber engagement.
• 304 EXTERIOR DEFENSE Forged from 304 (18-8) stainless steel to resist rust and corrosive bleeding in cedar, redwood, or pressure-treated timber.
• HIGH-TORQUE PERFORMANCE The robust hex head provides a secure 1/2 socket fit, ensuring controlled installation in dense hardwoods without the stripping of cross-drive screws.
• TECHNICAL SPECIFICATION To prevent timber splitting and ensure structural integrity, pre-drilling a pilot hole (7/32 for softwoods, 1/4 for hardwoods) is mandatory.

Specifications

• ASIN: B0F21F2XL3
• Internal SKU: IMS0640
• Size: 5/16" x 2-1/2"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 10