"IMSCREWS 1/2"" x 4"" Heavy-Duty Lag Screws - 304 Stainless Steel (5 PCS)

Maximum Structural Integrity
The 1/2"" diameter lag screw is the ultimate fastener for safety-critical timber construction, offering the highest shear resistance in its class. These 4-inch bolts are engineered for deep penetration into structural posts, making them the professional choice for securing heavy deck beams, playground sets, or landscape retaining walls.

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 structure. This design eliminates the ""bridging"" effect where boards remain loose, ensuring the two surfaces are clamped together with massive tension for a gap-free, permanent connection.

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. These screws prevent structural failure due to corrosion and eliminate unsightly rust streaks on high-value cedar, redwood, or premium structural framing.

FAQ
¡ñ Tools: Fits a standard 3/4"" hex socket or wrench.
¡ñ Pre-drilling: Mandatory for this diameter and length. Use a 5/16"" bit for softwoods or 3/8"" bit for hardwoods to prevent timber splitting while maintaining maximum thread bite.
¡ñ Why 4"" length? Optimized for passing through 2"" or 2.5"" thick timber while maintaining a massive 1.5""+ thread anchor in the base post for maximum pull-out resistance.

Specs:
- Size: 1/2"" x 4""
- Thread: Partially Threaded (Max Clamping)
- Material: 304 Stainless Steel
- Drive: 3/4"" Hex Head
- Qty: 5 PCS"

Key Features

• [ELITE CLAMPING POWER] The engineered partial thread allows the smooth shank to bypass the outer beam, pulling components together for a gap-free, rock-solid joint.
• [ULTIMATE SHEAR RESISTANCE] Features a massive 1/2" industrial diameter for superior lateral strength, the definitive choice for high-load structural nodes.
• [304 EXTERIOR SHIELD] Forged from premium 304 (18-8) stainless steel to endure humid timber cores and prevent rust staining in cedar, redwood, or ACQ lumber.
• [MAX-TORQUE INTERFACE] Robust hex head fits standard 3/4" socket drives, delivering maximum torque transfer for controlled installation in dense hardwoods.
• [TECHNICAL SPECIFICATION] To ensure safety and prevent splitting, pre-drilling a deep pilot hole (5/16" for softwoods, 3/8" for hardwoods) is mandatory.

Specifications

• ASIN: B0F219X2YR
• Internal SKU: IMS0707
• Size: 1/2" x 4"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 5