The DeWALT ANCHORS & FASTENERS Power-Stud+ SD1 Hex Nut Carbon Steel Wedge Expansion Anchor (3/4" x 4-1/4") is a fully threaded, torque-controlled wedge expansion anchor engineered for consistent, reliable performance in both cracked and uncracked concrete. With a zinc plated carbon steel body and expansion clip, this anchor delivers secure, long-lasting fastening in a wide range of structural concrete and masonry base materials - making it a trusted choice for contractors, engineers, and construction professionals working on demanding anchoring applications.

Key Features

• Fully threaded, torque-controlled wedge expansion design - ensures consistent clamping force and reliable load performance without the guesswork during installation
• Designed for performance in cracked and uncracked concrete - provides dependable holding power across varying concrete conditions, including normal-weight concrete, sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry
• Consistent performance in high and low strength concrete - gives installers confidence across a broad range of structural concrete applications without needing different anchor types
• Nominal drill bit size matches the anchor diameter - simplifies tool selection and speeds up the drilling process by eliminating the need for oversized or special drill bits
• Anchor can be installed through standard fixture holes - allows direct installation without removing or modifying the fixture, saving time on the job site
• Length ID code and identifying marking stamped on the head of each anchor - allows for easy field verification and inspection without referencing separate documentation
• Anchor design allows for follow-up expansion after setting under tensile loading - provides added security as the anchor continues to tighten under load, improving performance in demanding structural conditions
• Zinc plated carbon steel body and expansion clip - delivers corrosion resistance suitable for interior structural and concrete applications while maintaining high tensile strength
• Hex nut head style - works with standard wrenches and power tools for fast, efficient installation
• Nut and washer included - provides a complete anchoring solution right out of the package, reducing the need for additional hardware sourcing

Why This Product

• Engineered for cracked concrete environments - unlike basic expansion anchors, the Power-Stud+ SD1 is specifically designed to maintain holding strength in cracked concrete, making it appropriate for seismic and high-stress structural applications
• Broad base material compatibility - suitable for normal-weight concrete, sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry, reducing the need to stock multiple anchor types for different substrates
• Follow-up expansion under tensile load - the anchor continues to expand as load is applied, providing a self-tightening effect that enhances long-term connection integrity in structural installations
• Simplified installation process - the same-diameter drill bit requirement and through-fixture installation capability reduce setup time and potential for error, making this anchor well-suited for high-volume or time-sensitive projects

Specifications

• Brand: DeWALT
• Product Type: Wedge Bolt
• Diameter: 3/4 in.
• Fastener Length: 4-1/4 in.
• Head Style: Hex Nut
• Thread Type: Standard
• Primary Material: Carbon Steel
• Fastener Plating: Zinc
• Finish: Silver
• Connection Design: Concrete & Masonry
• Design Type: Hex
• Weight: 0.620 lb
• Country of Origin: China

Available Pack Options

• 7440SD1-PWR: 20 Pk
• 7440SD1-PWR -3: 60 Pk

Approved Applications

• Normal-weight concrete - structural fastening in standard poured concrete slabs, walls, and foundations
• Sand-lightweight concrete - suitable for anchoring in lighter concrete mixes used in elevated deck and floor applications
• Concrete over steel deck - appropriate for anchoring through composite deck assemblies common in commercial construction
• Grouted concrete masonry - provides reliable fastening in fully grouted CMU wall systems
• Cracked concrete zones - engineered to maintain performance in tension and seismic zones where concrete cracking is anticipated

Frequently Asked Questions

What makes the Power-Stud+ SD1 suitable for cracked concrete applications?

The Power-Stud+ SD1 is a torque-controlled wedge expansion anchor specifically designed for consistent performance in both cracked and uncracked concrete. Its design allows for follow-up expansion after setting under tensile loading, which means the anchor continues to tighten and maintain holding strength even as concrete conditions change - an important characteristic in seismic or high-stress structural environments.

What drill bit size is needed to install this anchor?

The nominal drill bit size is the same as the anchor diameter, which is 3/4 in. This means you do not need a different or oversized drill bit - just match the bit size to the anchor size for correct hole preparation.

Can this anchor be installed through the fixture without removing it?

Yes. The anchor can be installed through standard fixture holes, which means there is no need to remove or reposition the fixture during installation. This simplifies the process and helps reduce installation time on the job site.

What base materials is this wedge anchor compatible with?

This anchor is designed for use in normal-weight concrete, sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry. It is not intended for use in base materials outside of these categories, so always confirm the substrate type before installation to ensure appropriate load performance.