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

Extreme Reach for Structural Framing
When projects demand deep penetration in heavy timber, these 5.5-inch lag bolts provide the reach needed. Perfect for joining structural beams, thick posts, or landscape timbers. The 5/16 diameter offers elite shear resistance for critical load-bearing nodes.

Vise-Like Clamping with Partial Threading
Our partially threaded shank allows the bolt to spin freely in the outer board, pulling the timber members together for a gap-free, rock-solid joint. This design is superior for deep-reach framing where full-thread screws often cause bridging gaps and loose connections.

304 Stainless Exterior Defense
Forged from premium 18-8 (304) Stainless Steel. compatible with ACQ pressure-treated lumber. Resists rust in humid areas and prevents unsightly rust streaks on high-value cedar, redwood, or deck framing.

FAQ
¡ñ Tools: Fits standard 1/2 hex socket or wrench.
¡ñ Pre-drilling: Mandatory to prevent splitting. Use 3/16 bit for softwoods or 7/32 for hardwoods.
¡ñ Why 5.5 length? Designed to pass through 3 or 4 thick timber with a deep 1.5 + thread anchor in the base post.
¡ñ Resilience: Rated for marine, coastal, and high-humidity outdoor environments.

Specs:
- Size: 5/16 x 5-1/2
- Thread: Partially Threaded (Max Clamping)
- Material: 304 Stainless Steel (18-8)
- Drive: 1/2 Hex Head
- Qty: 10 pcs"

Key Features

• MAXIMUM CLAMPING FORCE The partially threaded design allows the smooth shank to pass through the outer timber, drawing multi-layer heavy beams tightly together for a solid structural joint.
• DEEP STRUCTURAL ANCHORING At 5-1/2 inches, these screws provide deep-reach stability for 4x4 and 6x6 posts, ensuring structural nodes remain secure under heavy load-bearing conditions.
• 304 STAINLESS DEFENSE Forged from premium 304 (18-8) stainless steel to prevent rust in the wood core. Chemically compatible with ACQ pressure-treated lumber for outdoor structural projects.
• POWER TOOL COMPATIBLE The heavy-duty hex head is designed to handle sustained torque from impact drivers. Use a 1/2 socket to ensure stable, stripped-free installation in dense hardwoods.
• TECHNICAL INSTALLATION For 5.5-inch structural drives, pre-drilling a pilot hole (7/32 for softwoods, 1/4 for hardwoods) is required to ensure proper thread engagement and prevent timber splitting.

Specifications

• ASIN: B0F21BXFB2
• Internal SKU: IMS0658
• Size: 5/16" x 5-1/2"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 10