The Simpson MSTC66 65-3/4 in. 14-Gauge Galvanized Medium Strap from Simpson Strong-Tie is a high-capacity structural strap built to transfer tension loads across a wide variety of wood-to-wood connections. Whether reinforcing floor-to-floor clear span assemblies, bracing against wind and seismic forces, or handling light repairs and heavy-duty framing projects, this versatile strap installs on the wide or narrow face of lumber and can be used back-to-back on a single member without fastener interference.

Key Features

• Designed to transfer tension loads in a wide variety of applications - gives builders and contractors a single, adaptable strap solution for structural connections ranging from floor systems to seismic and wind bracing.
• High-capacity strap with a staggered nail pattern - distributes fastener load across the wood more evenly, actively reducing the risk of splitting during installation for a cleaner, stronger result.
• Countersunk nail slots - provide a lower nail-head profile so the strap sits flush against the lumber, reducing interference with adjacent materials and finishing work.
• 14-gauge steel construction - delivers the rigidity and load capacity needed for demanding structural applications without excess bulk.
• G90 zinc galvanized finish - provides extra corrosion resistance, making this strap a dependable choice where moisture exposure is a concern over the life of the structure.
• Compatible with 16d sinkers or #9 x 1 1/2 in. Strong-Drive SD screws - offers fastener flexibility so installers can work with the hardware they already have on site or optimize for code-compliant screw installation.

Why This Product

• Versatility across connection types - the MSTC66 is engineered for a broad range of tension load transfer applications, from floor-to-floor spanning to wind and seismic resistance, reducing the need to source multiple strap types for a single project.
• Installation-friendly design - the combination of countersunk nail slots and a staggered fastener pattern speeds up installation while protecting the lumber, making this strap a practical choice for both repairs and new structural work.
• Long-term corrosion protection - the G90 zinc galvanized coating goes beyond basic rust resistance, helping the strap maintain its structural integrity in environments where moisture is an ongoing factor.
• Dual-face and back-to-back use - because this strap works on the wide or narrow face of lumber and can be paired back-to-back without fastener interference, it adapts to job-site conditions rather than forcing workarounds.

Specifications

• MPN: MSTC66
• Brand: Simpson Strong-Tie
• Length: 65-3/4 in.
• Width: 3 in.
• Gauge: 14
• Thickness: 68 mil
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Install With: Install with 16d sinkers or #9 x 1-1/2 in. Strong-Drive SD screws (sold separately)
• Country of Origin: United States

Approved Applications

• Wood-to-wood tension load transfer connections
• Floor-to-floor clear span applications
• Use on the wide or narrow face of lumber
• Light repairs and heavy-duty structural projects
• Wind and seismic force resistance connections

Options

• Special sizes can be made to order. Contact us for Configurable Options and Special orders

Frequently Asked Questions

What fasteners are recommended for installing the MSTC66?

Install with 16d sinkers or #9 x 1-1/2 in. Strong-Drive SD screws for optimal performance.

Why does the MSTC66 use a staggered nail pattern?

The staggered nail pattern is specifically designed to help minimize wood splitting during installation, making it a high-capacity solution suitable for demanding structural connections.

What does the G90 galvanized coating provide?

The G90 zinc galvanized coating provides extra corrosion resistance, making the MSTC66 suitable for applications where moisture exposure is a concern.

Can the MSTC66 be used on both faces of lumber?

Yes. Simpson Strong-Tie straps, including this model, can be used on the wide or narrow face of lumber, and many are designed to be used back-to-back on a piece of lumber without fastener interference.

Note: Product dimensions and/or Screw or Bolt holes may differ from picture. Please see item description for specifications.