The Simpson 1/2 in Dome Washer with 3/4 in Pin is a gas-actuated fastener from Simpson engineered for reliable, high-volume attachment of building components to concrete. Pairing a 1/2 in dome washer with a 3/4 in pin, this zinc-finished carbon steel fastener is built for job sites where consistent holding strength and fastening speed are non-negotiable. When used with compatible powder-actuated tools, it is also capable of penetrating harder substrates including structural steel and extra-hard concrete.

Key Features

• Gas-Actuated Compatibility - Optimized for gas-actuated tools, enabling rapid, high-volume fastening that keeps production moving on demanding job sites.
• 1/2 in Dome Washer - The wide dome washer head distributes load across the fastened material, reducing the risk of pull-through and improving connection integrity.
• 3/4 in Pin Length - Sized for solid embedment into concrete, providing dependable holding strength for typical building component attachment applications.
• Zinc-Finished Carbon Steel Construction - The zinc coating offers a layer of corrosion resistance over the carbon steel body, helping maintain fastener integrity in construction environments.
• Broader Substrate Capability - Compatible with powder-actuated tools for penetration into harder materials such as structural steel and extra-hard concrete, extending versatility beyond standard concrete applications.

Why This Product

• Built for High-Volume Work - The gas-actuated design is specifically optimized for repetitive fastening tasks, making it a practical choice for contractors who need speed and consistency across large-scale concrete attachment projects.
• Versatile Substrate Performance - Beyond standard concrete fastening, compatibility with powder-actuated tools allows this pin to tackle harder substrates like structural steel and extra-hard concrete - reducing the need to source multiple fastener types for a single job.
• Trusted Simpson Construction - Manufactured by Simpson, a well-established name in structural fastening, this dome washer pin delivers the material quality and dimensional consistency that professional installers rely on.
• Dome Washer Design for Secure Load Distribution - The 1/2 in dome washer configuration provides broader bearing surface contact compared to a standard flat fastener, helping secure building components firmly against the substrate without compromising the fastened material.

Specifications

• Manufacturer Part Number (MPN): GW75-R200
• Manufacturer: Simpson Strong-Tie
• Pin Diameter: .125"
• Head (Washer) Diameter: .300"
• Pin Length: 3/4"
• Washer Size: 1/2"
• Finish: Zinc
• Material: Carbon Steel
• Quantity per Pack: 200

Approved Applications

• Fastening building components to concrete
• High-volume gas-actuated fastening applications
• Fastening into harder substrates such as structural steel (with compatible powder-actuated tools)
• Fastening into extra-hard concrete (with compatible powder-actuated tools)

What's Included

• 200 x Simpson Strong-Tie GW75-R200 1/2" Dome Washer with 3/4" Pin (Zinc-Finished Carbon Steel)

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

Frequently Asked Questions

What type of tool is required to drive the GW75-R200 pin?

The GW75-R200 is designed for use with gas-actuated tools and is also compatible with common powder-actuated tools, making it suitable for high-volume fastening applications on the job site.

What substrates can the GW75-R200 fasten into?

This pin is engineered primarily for fastening building components to concrete. It is also capable of penetrating harder substrates, including structural steel and extra-hard concrete, when used with compatible powder-actuated tools.

What are the key dimensions and material specifications of the GW75-R200?

The GW75-R200 features a 3/4" pin length with a pin diameter of .125" and a 1/2" dome washer with a head diameter of .300". It is constructed from carbon steel with a zinc finish for corrosion resistance.

How many pins are included in one pack of the GW75-R200?

Each pack of the GW75-R200 contains 200 pins, making it well suited for large-scale or continuous fastening work where a high volume of fasteners is needed.