The Simpson Sleeve-All Rod-Coupler Head Sleeve Anchor is a pre-assembled expanding sleeve anchor engineered by Simpson for secure, reliable fastening in solid base materials such as concrete and brick. Built around a rod-coupler head configuration, this anchor is purpose-designed for applications where a 3/8 in. threaded rod must be anchored firmly into solid masonry or concrete, making it a practical choice for structural installations, infrastructure projects, and demanding construction applications. Constructed from zinc-plated carbon steel, it carries FM and UL approvals along with multiple DOT listings, confirming its suitability for regulated and performance-critical work.

Key Features

• Expansion anchor for use in solid base materials - mechanically locks into concrete, brick, and solid masonry for a dependable, load-bearing hold that does not rely on adhesive or grout
• FM and UL approved with multiple DOT listings - meets rigorous third-party safety and performance standards, so contractors can confidently specify this anchor on regulated infrastructure and structural projects
• Rod-coupler head - accepts a 3/8 in. threaded rod connection directly, eliminating the need for additional coupling hardware and streamlining installation where threaded rod anchoring is required
• Pre-assembled expanding sleeve design - arrives ready to install with no field assembly required, reducing setup time and minimizing the risk of improper component configuration on the job site
• Zinc-plated carbon steel construction - the zinc plating provides a layer of corrosion resistance over the carbon steel body, supporting durability in typical interior and protected structural environments
• Requires a 3/8 in. drill bit and 1/2 in. wrench - straightforward tooling requirements mean this anchor integrates easily into standard installation workflows without specialized equipment

Why This Product

• Approved for regulated and infrastructure applications - FM and UL approvals combined with multiple DOT listings make this sleeve anchor one of the few expanding anchor options that can be confidently used on projects where third-party certification is a hard requirement, not just a preference
• Built specifically for threaded rod coupling - the rod-coupler head is designed from the ground up for 3/8 in. threaded rod connections, giving engineers and installers a clean, integrated anchoring solution rather than a workaround with mismatched hardware
• Consistent, repeatable installation in solid concrete and masonry - the pre-assembled sleeve and straightforward tooling requirements reduce variables on the job site, helping crews achieve reliable results across every anchor set in the work
• Trusted Simpson engineering behind every anchor - Simpson has a well-established history of designing mechanical anchors for demanding structural applications, and this sleeve anchor reflects that same focus on performance in solid base materials under real load conditions

Specifications

• Model Number: SL37178C
• Brand: Simpson Strong-Tie
• Head Type: Rod-Coupler Head
• Size: 3/8 in. x 1-7/8 in.
• Diameter: 3/8 in.
• Bolt/Rod Diameter: For 3/8 rod
• TPI: 18
• Drill Bit Size: 3/8 in.
• Wrench Size: 1/2 in.
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Packaging: Packs of 50 and Cartons of 200

Approved Applications

• Solid concrete fastening and anchoring
• Brick and solid masonry base material installations
• Structural applications requiring FM and UL approved anchors
• Infrastructure and construction projects with DOT listing requirements
• Threaded rod coupling connections in solid base materials

Frequently Asked Questions

What base materials is the SL37178C Sleeve-All anchor designed for?

The SL37178C is an expansion anchor designed for use in all types of solid base materials, including concrete and brick. It is not intended for use in hollow or unsupported materials.

What drill bit size is required to install this anchor?

A 3/8 in. drill bit is required to create the correctly sized hole for this anchor. It is important to avoid oversized holes, as they will make it difficult to set the anchor and will reduce the anchor's load capacity.

What type of head does the SL37178C feature, and what is it used for?

This anchor features a rod-coupler head, which is designed to connect to a 3/8 in. threaded rod. This makes it well-suited for applications where a threaded rod must be anchored securely into solid base materials.

Is the SL37178C anchor approved for regulated or code-required construction projects?

Yes. The SL37178C is FM and UL approved and carries multiple DOT listings, making it suitable for projects that require verified anchor performance in regulated infrastructure and structural construction applications.

Note: Product dimensions and/or thread length may differ from picture. Please see the item description above for specifications.