The Simpson Heli-Tie 3/8 in. x 12 in. Helical Wall Tie is a Type 304 stainless steel masonry connector engineered to anchor building facades to structural members and to stabilize brick walls in both new construction and retrofit applications. The helical design allows the tie to be driven into a predrilled pilot hole - or embedded directly into mortar joints during new construction - forming a reliable mechanical connection between a masonry facade and its backup material. As the tie is driven, its fins undercut the masonry to create an expansion-free anchorage that withstands both tension and compression loads. Compatible with concrete, masonry, wood stud, and steel stud backup systems, this wall tie is installed using the HELITOOL37A Heli-Tie fastener installation tool with a rotohammer in hammer mode.

Key Features

• Rotohammer-driven installation in hammer mode - the tie installs faster than competitive products, reducing labor time on the job site
• Countersunk up to 1/2 in. below the masonry surface after installation - allows the tie location to be patched, providing an inconspicuous repair that preserves the appearance of the building
• Larger core diameter with higher torsional capacity - results in less deflection due to "uncoiling" under load, maintaining connection integrity over time
• Fractionally sized 3/8 in. anchor requiring only a 7/32 in. or 1/4 in. drill bit - no metric drill bits needed, keeping the installation straightforward with standard tooling
• Type 304 stainless steel construction - delivers long-term corrosion resistance in exterior facade and masonry wall tie applications where moisture exposure is a concern
• Performs in multiple backup materials - installs into concrete, masonry, wood studs, and steel studs, making it a versatile solution for a wide range of wall assembly types

Why This Product

• Expansion-free anchorage for demanding load conditions - the helical fin design mechanically undercuts the masonry as the tie is driven, creating an anchor that resists both tension and compression without the risk of expansion stress cracking the surrounding material
• A single tie for new construction and masonry repair - whether embedded into fresh mortar joints on a new build or driven into a predrilled hole to retrofit and replace failing wall ties, this helical wall tie handles both scenarios without swapping to a different product
• Clean, patchable finish protects building aesthetics - because the tie is countersunk below the surface after installation, repair work on existing brick facades can be concealed completely, a meaningful advantage on historically sensitive or high-visibility structures
• Engineered for speed without sacrificing strength - the larger core diameter improves torsional capacity and reduces uncoiling under load, while the rotohammer-driven installation process keeps crews working efficiently across concrete, masonry, wood, and steel stud backup systems

Specifications

• MPN: HELI371200A
• Brand: Simpson Strong-Tie
• Diameter: 3/8 in.
• Length: 12 in.
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Required Drill Bit Diameter: 7/32 in. or 1/4 in.
• Packaging: Packs of 50 and Cartons of 200
• Country of Origin: United Kingdom

Approved Applications

• Anchoring building façades to structural members
• Stabilizing existing or new-construction 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
• Retrofitting and repairing existing masonry wall ties

Frequently Asked Questions

What tool is required to install the HELI371200A Heli-Tie wall tie?

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 in hammer mode to drive and countersink the tie into the predrilled pilot hole.

What size pilot hole is needed before installing this wall tie?

A predrilled pilot hole using either a 7/32 in. or 1/4 in. drill bit is required prior to installation of the 3/8 in. x 12 in. Heli-Tie wall tie.

How deep below the surface is the tie countersunk after installation?

After installation, the Heli-Tie is countersunk up to 1/2 in. below the masonry surface, allowing the tie location to be patched for an inconspicuous repair that preserves the appearance of the building.

What backup materials is this Heli-Tie compatible with?

The Heli-Tie wall tie is designed to perform in concrete and masonry as well as wood and steel stud backup systems, making it a versatile solution for both new construction and retrofit applications.

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