The Simpson Heli-Tie Helical Wall Tie (HELI37700A) is a corrosion-resistant, Type 304 stainless steel anchor tie engineered to secure building façades to structural members or to stabilize brick walls. Measuring 3/8 in. in diameter and 7 in. in length, the Heli-Tie's helical design allows it to be driven quickly into a predrilled pilot hole or embedded into mortar joints during new construction, creating a reliable mechanical connection between a masonry façade and its backup material. As the tie is driven, its fins undercut the masonry to deliver expansion-free anchorage capable of withstanding both tension and compression loads.

Key Features

• Installs quickly and easily - with the rotohammer in hammer mode, the tie installs faster than competitive products
• Provides an inconspicuous repair that preserves the appearance of the building; after installation, the tie is countersunk up to 1/2 in. below the surface, allowing the tie location to be patched
• Larger core diameter provides higher torsional capacity, resulting in less deflection due to "uncoiling" under load
• Fractionally sized anchor - no metric drill bits required
• Performs in concrete and masonry as well as wood and steel studs
• Corrosion-resistant Type 304 stainless steel construction for long-lasting durability
• Required drill bit diameter: 7/32 in. or 1/4 in.
• Installed using the HELITOOL37A Heli-Tie fastener installation tool with an SDS-plus shank rotohammer

Specifications

• MPN: HELI37700A
• Brand: Simpson
• Diameter: 3/8 in.
• Length: 7 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: GB

Approved Applications

• Anchoring building façades to structural members
• Stabilizing existing brick walls
• Connecting masonry façades to concrete and masonry backup materials
• Connecting masonry façades to wood stud backup systems
• Connecting masonry façades to steel stud backup systems
• New construction mortar joint embedding applications
• Retrofit and repair applications requiring inconspicuous, patchable installation

Frequently Asked Questions

What tool is required to install the Heli-Tie HELI37700A?

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

What drill bit size is needed to prepare the pilot hole for this wall tie?

A pilot hole should be drilled using either a 7/32 in. or 1/4 in. diameter drill bit before driving the Heli-Tie into place. No metric drill bits are required, as this is a fractionally sized anchor.

What materials can the Heli-Tie HELI37700A be installed into?

The Heli-Tie wall tie is designed to perform in concrete and masonry backup materials as well as wood and steel stud construction, making it suitable for a wide range of façade anchoring and wall stabilization applications.

How does the Heli-Tie achieve an inconspicuous installation finish?

After installation, the tie is countersunk up to 1/2 in. below the masonry surface. This recessed placement allows the tie location to be patched, preserving the appearance of the building and leaving no visible hardware on the façade.

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