"IMSCREWS 1/4 x 4 Heavy-Duty Lag Screws - 304 Stainless Steel (10 pcs)

Extreme Reach for Deep Structural Timber
Our 4-inch lag bolts are engineered for projects requiring maximum penetration. Ideal for securing heavy timber framing, landscape wall timbers, or attaching thick components to 4x4 and 6x6 posts. The 1/4 diameter provides professional shear resistance for outdoor load-bearing joints.

Vise-Like Clamping Power
Our partially threaded shank features a smooth upper section that allows the bolt to pull the outer board tightly against the support beam. This 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 Protection
Premium 18-8 (304) stainless steel resists rust in humid or coastal environments. compatible with ACQ pressure-treated lumber. Prevents unsightly rust streaks on high-value cedar, redwood, or heavy deck framing.

FAQ
¡ñ Tools: Fits a standard 7/16 hex socket or wrench.
¡ñ Pre-drilling: Mandatory for this length. Use a 1/8 bit for softwoods or 3/16 for hardwoods to prevent timber splitting.
¡ñ Why 4 length? Optimized for passing through 2 or 2.5 thick timber with a deep 1.5 + thread anchor in the base post.

Specs:
- Size: 1/4 x 4
- Thread: Partially Threaded (Max Clamping)
- Material: 304 Stainless Steel
- Drive: 7/16 Hex Head
- Qty: 10 pcs"

Key Features

• DYNAMIC CLAMPING FORCE Engineered with a partial thread to allow the smooth shank to bypass the outer timber, pulling members together for a rock-solid, gap-free structural joint.
• EXTRA-LONG REACH At 4 inches, these bolts provide elite penetration for heavy timber framing, securing 2x or 4x lumber to structural posts with maximum withdrawal resistance.
• 304 CORE DEFENSE Forged from premium 304 (18-8) stainless steel to prevent rust and staining in cedar, redwood, or ACQ pressure-treated lumber core.
• STABLE TORQUE DRIVE Precision hex head ensures a secure 7/16 socket fit, providing stable torque transfer for controlled seating in extra-thick timber.
• TECHNICAL SPECIFICATION To prevent splitting and protect the long 1/4 shaft, pre-drilling a full-depth pilot hole (3/16 for softwoods, 7/32 for hardwoods) is mandatory.

Specifications

• ASIN: B0F21D1JSJ
• Internal SKU: IMS0625
• Size: 1/4" x 4"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 10