"IMSCREWS 3/8 x 1-1/4 Heavy-Duty Lag Screws - 304 Stainless Steel (5 pcs)

Extreme Shear Strength for Compact Mounting
When 1/4 or 5/16 screws are too weak for the task, these 3/8 diameter bolts deliver industrial-grade stability. Perfect for mounting heavy-duty casters, steel brackets, or machinery bases to 2x lumber (1.5 actual thickness) without piercing the back side.

Fully Threaded for Maximum Bite
In shorter 1.25 fasteners, maximizing surface area is vital. Our fully threaded design provides constant engagement from tip to head. This maximizes pull-out resistance in shallow depths where partial threads would leave the connection loose and unsafe.

304 Stainless Exterior Protection
Forged from premium 18-8 (304) Stainless Steel for ultimate weather defense. compatible with ACQ pressure-treated lumber, preventing chemical corrosion and unsightly rust streaks on cedar, redwood, or deck framing.

FAQ
¡ñ Tools: Fits standard 9/16 hex socket or wrench.
¡ñ Pre-drilling: Recommended to prevent splitting. Use 1/4 bit for softwoods or 9/32 bit for hardwoods.
¡ñ Why 3/8 diameter? Offers elite lateral resistance for heavy, high-vibration, or load-bearing hardware.
¡ñ Environment: Highly resistant to corrosion in freshwater and humid coastal zones.

Specs:
- Size: 3/8 x 1-1/4
- Thread: Fully Threaded (Max Grip)
- Material: 304 Stainless Steel (18-8)
- Drive: 9/16 Hex Head
- Qty: 5 pcs"

Key Features

• ULTIMATE SHEAR STRENGTH The robust 3/8-inch diameter offers industry-leading lateral load capacity. Specifically designed for mounting heavy-duty base plates and industrial hardware where standard bolts fail.
• OPTIMIZED SHALLOW GRIP Featuring a fully threaded profile to maximize fiber engagement in limited 1-1/4 inch depths. Perfect for securing heavy items to 2x lumber without over-penetration.
• STRUCTURAL 304 STAINLESS Forged from premium 304 (18-8) stainless steel to prevent rust and chemical corrosion. Compatible with ACQ pressure-treated lumber for high-moisture exterior projects.
• HIGH-TORQUE DRIVE The oversized hex head is built for heavy-duty power tools. Use a 9/16 socket to ensure stable torque transfer and professional stripped-free installation.
• MANDATORY GUIDELINE To prevent severe timber splitting with this massive 3/8 diameter, pre-drilling a pilot hole (1/4 for softwoods, 9/32 for hardwoods) is mandatory.

Specifications

• ASIN: B0F21CQW6X
• Internal SKU: IMS0660
• Size: 3/8" x 1-1/4"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Hex
• Package Quantity: 5