DeWALT Anchors and Fasteners Power-Stud+ SD1 Hex Nut Wedge Expansion Anchor (5/8 in. x 8-1/2 in.) is a fully threaded, torque-controlled wedge expansion anchor engineered for consistent performance in both cracked and uncracked concrete. Zinc plated carbon steel construction gives this wedge bolt the durability needed for demanding structural connections in normal-weight concrete, sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry. Whether you are anchoring structural steel, equipment, or fixtures to concrete surfaces, this heavy-duty wedge anchor delivers reliable holding power across a wide range of base materials and load conditions.

Key Features

• Consistent performance in high and low strength concrete - means reliable holding power regardless of the concrete mix or condition on your jobsite, reducing the need to re-evaluate anchor selection for varying substrates
• Nominal drill bit size matches the anchor diameter - simplifies tool selection and setup, eliminating guesswork and reducing drilling errors during installation
• Anchor can be installed through standard fixture holes - allows direct installation through the fixture without oversizing holes or disassembling the connection, saving time on the jobsite
• Length ID code and identifying marking stamped on the head of each anchor - makes it easy to confirm the correct anchor is in place after installation, supporting inspection and quality control
• Anchor design allows for follow-up expansion after setting under tensile loading - provides an additional margin of holding reliability as the anchor self-adjusts under load, reducing the risk of pull-out over time
• Zinc plated carbon steel body and expansion clip - the zinc plating provides a protective layer against corrosion while the carbon steel core delivers the structural strength required for concrete anchoring applications
• Fully threaded design with hex nut and washer included - the complete threaded length gives maximum flexibility in embedment depth adjustment, and the included nut and washer mean the anchor is ready to install straight from the box

Why This Product

• Designed for use in both cracked and uncracked concrete - this anchor meets the more demanding performance standard required for seismic and structural applications where concrete cracking is a real-world concern
• Torque-controlled expansion mechanism - the wedge expands as the nut is tightened to a specified torque, giving installers a clear, measurable installation endpoint rather than relying on guesswork or feel
• Suitable for multiple concrete base materials including normal-weight concrete, sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry - a single anchor type can cover a broad range of substrate conditions found in commercial and industrial construction
• 5/8 in. diameter at 8-1/2 in. length provides substantial embedment depth for heavy-duty fastening requirements where smaller anchors would not meet load demands

Specifications

• Brand: DeWALT
• Product Type: Wedge Bolt
• Diameter: 5/8 in.
• Fastener Length: 8-1/2 in.
• Head Style: Hex Nut
• Thread Type: Standard
• Primary Material: Carbon Steel
• Fastener Plating: Zinc
• Finish: Silver
• Connection Design: Concrete and Masonry
• Design Type: Hex
• Weight: 0.716 lb
• Country of Origin: China

Available Pack Options

• 7438SD1-PWR: 25 Pk
• 7438SD1-PWR -4P: 100 Pk

Approved Applications

• Normal-weight concrete
• Sand-lightweight concrete
• Concrete over steel deck
• Grouted concrete masonry

Frequently Asked Questions

What types of concrete is this wedge expansion anchor rated for?

This anchor is designed for consistent performance in both cracked and uncracked concrete. Approved base materials include normal-weight concrete, sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry.

What drill bit size should I use to install this anchor?

The nominal drill bit size is the same as the anchor diameter, which is 5/8 in. This eliminates the need to reference a separate drill chart and simplifies hole preparation on the jobsite.

Does this anchor include a nut and washer?

Yes. A nut and washer are included with each anchor, so no additional hardware is required to complete the installation.

How does the torque-controlled expansion mechanism work?

As the hex nut is tightened to the specified installation torque, the wedge clip at the base of the anchor expands against the walls of the drilled hole, generating the holding force. The anchor design also allows for follow-up expansion after setting under tensile loading, providing additional holding reliability over time.