Simpson Strong Tie SD8X1.25-R Strong Drive Screw

Product Description

The SIMPSON STRONG TIE SD8X1.25-R is a structural wood screw designed for high-load fastening applications in framing, decking, and general construction repair. The sharp point and deep thread profile allow for fast penetration into wood and engineered lumber with minimal splitting risk. A corrosion-resistant finish extends service life in both interior and exterior conditions. This screw is sold individually and is sized at 1.25 inches in length, making it well suited for thinner material connections and structural tie fastening where precise depth control is required.

The SD8X1.25-R is used in residential and light commercial construction by framing carpenters, structural contractors, and general building trades. Typical applications include fastening structural connectors, hangers, hold-downs, and hardware plates to dimensional lumber and engineered wood products. The 1.25-inch length is commonly specified when driving into shallower material stacks or when connector flange thickness limits usable screw length. The corrosion-resistant finish makes it suitable for treated lumber and outdoor framing assemblies.

Key Features

• Sharp point enables fast-start penetration without pre-drilling in most wood applications
• Deep thread design reduces splitting risk in dimensional and engineered lumber
• Corrosion-resistant finish rated for indoor and outdoor use, including treated lumber environments
• 1.25-inch length suited for structural connector and hanger fastening applications
• Sold as individual unit (EA) with package quantity of 16

Compatibility

Designed as an OEM-style fastener for use with Simpson Strong-Tie structural connectors and hardware requiring SD-series screws. Consult the connector manufacturer load table to confirm screw size and quantity requirements for your specific application.

Installation Notes

Installation is performed by qualified carpenters or structural contractors following applicable building codes and connector manufacturer specifications. Power down any adjacent electrical systems before working in confined framing bays. Use a calibrated screw gun or impact driver set to the appropriate torque clutch setting to avoid overdriving and reducing fastener bearing capacity. Do not substitute screw length or diameter without verifying against the connector manufacturer load tables.

Technical Specifications

• Length: 1.25 inches
• Weight: 10 pounds
• Unit of Measure: EA
• Package Quantity: 16

Standard Information

• Brand: SIMPSON STRONG TIE
• Manufacturer Part Number: SD8X1.25-R