"IMSCREWS 1/4 x 4 Heavy-Duty Lag Screws - 304 Stainless Steel (20 pcs)

Extra-Long Reach for Structural Wood
Engineered for deep penetration in heavy timber. Ideal for securing thick posts, landscape timbers, or mounting heavy brackets to structural beams. The 4-inch length provides elite stability for multi-layer wood construction.

The Power of Partial Threading
Our partially threaded shank allows the bolt to spin freely in the outer board, drawing components into a gap-free, vise-like joint. This design is superior to full-thread screws for joining thick lumber, as it eliminates the bridging effect.

304 Stainless Protection
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 cedar or redwood framing.

FAQ
¡ñ Tools: Fits standard 7/16 hex socket.
¡ñ Pre-drilling: Use 3/32 bit for softwoods or 5/32 for hardwoods to prevent splitting.
¡ñ Why 4 length? Optimized for passing through 2 or 3 thick sections with deep-core thread engagement.
¡ñ Marine use? Highly resistant in freshwater and humid coastal zones.

Specs:
- Size: 1/4 x 4
- Thread: Partially Threaded
- Material: 304 Stainless Steel
- Drive: 7/16 Hex Head
- Qty: 20 pcs"

Key Features

• DEEP STRUCTURAL ANCHORING The 4-inch length is engineered for heavy-duty timber-to-timber connections, providing deep fiber engagement for deck posts, pergolas, and structural framing.
• ENHANCED CLAMPING DESIGN Featuring a partially threaded shaft that allows the screw to pull large timber members tightly together, eliminating gaps for a more rigid, safe joint.
• HIGH-TORQUE 304 STAINLESS Forged from premium 304 (18-8) stainless steel to prevent rust in high-moisture timber cores. Offers the toughness needed for long-distance driving without brittle snapping.
• POWER TOOL COMPATIBLE The heavy-duty hex head is built for 7/16 power sockets. Designed to withstand the sustained torque required for deep 4-inch penetrations in dense wood.
• INSTALLATION GUIDELINE For 4-inch structural drives, pre-drilling a pilot hole (3/16 for softwoods, 7/32 for hardwoods) is mandatory to ensure thread formation and prevent timber splitting.

Specifications

• ASIN: B0F21C7421
• Internal SKU: IMS0626
• Size: 1/4" x 4"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 20