IMSCREWS 3/8 x 5 Extreme-Duty Lag Bolts - 304 Stainless Steel (2 pcs)
Maximum Reach for Massive Timber Structures
When projects demand industrial-grade penetration and unyielding shear resistance, these 3/8 x 5 bolts deliver. Engineered for extra-deep anchoring in heavy timber framing, securing 6x6 gate posts, or joining massive landscape beams. The 5-inch length provides elite stability for the thickest load-bearing wood members.
Vise-Like Clamping with Partial Threading
Our partially threaded shank is essential for long fasteners. It allows the bolt to spin freely in the outer board while the deep threads bite into the support beam. This draws the components together into a gap-free, rock-solid joint, eliminating the bridging effect where thick boards remain loose—a common failure in extra-long full-thread screws.
304 Stainless Exterior Defense
Forged from premium 18-8 (304) Stainless Steel for ultimate weather resistance. compatible with ACQ pressure-treated lumber. It prevents chemical corrosion and eliminates unsightly rust streaks on high-value cedar, redwood, or structural deck framing.
Technical FAQ
¡ñ Tools Required: Fits a standard 9/16 hex socket or wrench.
¡ñ Pre-drilling: Mandatory for this massive diameter and depth. Use a 1/4 bit for softwoods or 9/32 bit for hardwoods to prevent splitting.
¡ñ Why 5 length? Optimized for passing through 3 thick timber with a deep 2-inch thread anchor in the base post.
¡ñ Resilience: Rated for marine, coastal, and high-humidity outdoor use.
Specifications:
- Size: 3/8 x 5
- Thread: Partially Threaded (Max Clamping)
- Material: 304 Stainless Steel (18-8)
- Drive: 9/16 Hex Head
- Qty: 2 pcs

Key Features

• ULTIMATE CLAMPING FORCE Engineered with a partially threaded design to eliminate gaps between thick timbers, pulling members together for a rock-solid, vibration-free joint.
• INDUSTRIAL SHEAR RESISTANCE The massive 3/8-inch diameter offers heavy-duty lateral load resistance, ideal for securing main support beams and structural posts.
• EXTERIOR 304 STABILITY Premium 304 (18-8) stainless steel construction ensures zero rust bleeding and deep-core corrosion protection in outdoor cedar or redwood projects.
• STABLE TORQUE INTERFACE Precision hex head ensures a secure 9/16 socket fit, providing stable torque transfer for controlled, slip-free seating in extra-thick timber.
• MANDATORY PRE-DRILLING To prevent timber splitting and protect the 3/8 shaft, pre-drilling a pilot hole (1/4 for softwoods, 9/32 for hardwoods) is mandatory.

Specifications

• ASIN: B0F21BY97F
• Internal SKU: IMS0684
• Size: 3/8" x 5"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 2