The Simpson Heli-Tie 3/8 in. x 8 in. Helical Wall Tie is a Type 304 stainless steel tie engineered to anchor building facades to structural members and to stabilize or repair brick walls. Its helical design drives quickly and easily into a predrilled pilot hole - or embeds directly into mortar joints in new construction - forming a reliable mechanical connection between a masonry facade and its backup material. As the tie is driven, its fins undercut the surrounding masonry to deliver expansion-free anchorage that resists both tension and compression loads. Compatible with concrete, masonry, wood, and steel stud backup systems, this helical wall tie is a versatile solution for new construction, retrofit, and masonry repair applications alike.

Key Features

• Fast installation with a rotohammer in hammer mode - drives and countersinks quickly, saving labor time compared to other wall tie systems.
• Countersinks up to 1/2 in. below the surface after installation - allows the tie location to be patched for a clean, inconspicuous repair that preserves the building's appearance.
• Larger core diameter for higher torsional capacity - reduces deflection caused by "uncoiling" under load, maintaining a more secure connection over time.
• Fractionally sized at 3/8 in. diameter, requiring only a 7/32 in. or 1/4 in. drill bit - eliminates the need for metric drill bits, working with standard tools already on the job site.
• Type 304 stainless steel construction - provides corrosion resistance suited for long-term performance in exterior masonry and facade applications.
• Performs in concrete, masonry, wood, and steel stud substrates - gives contractors flexibility across a wide range of wall assembly types and project conditions.
• Compatible with new construction and retrofit applications - embeds into fresh mortar joints or drives into predrilled holes in existing masonry, making it useful at every stage of a building's life.

Why This Product

• Expansion-free anchorage in masonry - the fin design undercuts the masonry as the tie is driven, creating a mechanical lock that handles tension and compression without relying on expansion force, reducing stress on surrounding material.
• Invisible after installation - because the tie countersinks below the surface and the entry point can be patched, facade repairs and new tie installations leave no visible hardware, protecting the aesthetic of historic or finished masonry surfaces.
• No special tooling or metric hardware required - the fractionally sized anchor works with standard imperial drill bits, and installation is completed using the HELITOOL37A with any SDS-plus rotohammer, keeping the process straightforward for masonry contractors.
• Corrosion-resistant stainless steel for lasting exterior performance - Type 304 stainless steel construction makes this helical masonry tie a durable choice for anchoring and stabilizing facades in environments where long-term corrosion resistance is essential.

Specifications

• MPN: HELI37800A
• Brand: Simpson Strong-Tie
• Diameter: 3/8 in.
• Length: 8 in.
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Required Drill Bit Diameter: 7/32 in. or 1/4 in.
• Installation Tool: HELITOOL37A Heli-Tie fastener installation tool
• Packaging: Packs of 50 and Cartons of 400
• Country of Origin: United Kingdom

Approved Applications

• Anchoring building façades to structural members
• Stabilizing and repairing brick walls
• New construction - embedding directly into mortar joints
• Retrofit and repair applications in concrete and masonry substrates
• Connections to wood and steel stud backup systems

Frequently Asked Questions

What tool is required to install the Heli-Tie HELI37800A?

The Heli-Tie wall tie is installed using the HELITOOL37A Heli-Tie fastener installation tool, which features an SDS-plus shank. The tool is used with a rotohammer in hammer mode to drive and countersink the tie into the predrilled pilot hole.

What size pilot hole do I need to drill before installing this wall tie?

A predrilled pilot hole with a diameter of either 7/32 in. or 1/4 in. is required prior to installation. Because the anchor is fractionally sized, no metric drill bits are needed.

Can the Heli-Tie be used in both new construction and retrofit/repair projects?

Yes. In new construction, the Heli-Tie can be embedded directly into mortar joints. For retrofit and repair applications, the tie is driven into a predrilled pilot hole in existing masonry or concrete. The tie is countersunk up to 1/2 in. below the surface after installation, so the location can be patched for an inconspicuous repair.

What substrates is the HELI37800A compatible with?

The Heli-Tie wall tie performs in concrete and masonry substrates as well as wood and steel stud backup systems, making it versatile for a wide range of wall assembly types.

Note: Product dimensions may differ from picture. Please see the item description above for specifications.