The Simpson 1/2 in. Conduit Clamp with 1 in. x 0.125 in. Pin is a preassembled MEP fastener engineered to secure 1/2 in. conduit to concrete surfaces quickly and consistently. Designed by Simpson for mechanical, electrical, and plumbing installations, this cold-formed steel clamp and smooth-shank pin arrive as a single ready-to-install unit, eliminating on-site assembly steps and keeping high-volume fastening workflows moving without interruption. Compatible with both gas-actuated concrete nailer tools and common powder-actuated tools, this conduit clamp assembly handles a range of substrate conditions - from standard concrete to harder surfaces such as structural steel and extra-hard concrete - making it a reliable choice for professional installers working across varied job site environments.

Key Features

• Preassembled conduit clamp and pin - the smooth-shank pin and cold-formed steel clamp ship as one unified unit, so installers can drive and secure without pausing to load or align separate components on the job site.
• Dedicated 1/2 in. conduit fit - the clamp is sized specifically for 1/2 in. conduit, providing a precise, consistent hold that reduces the risk of slippage or misalignment during and after installation.
• Dual tool compatibility - works with gas-actuated concrete nailer tools for standard concrete applications and with common powder-actuated tools for harder substrates including structural steel and extra-hard concrete, giving crews flexibility across different site conditions.
• Carbon steel construction with zinc finish - delivers the strength needed for demanding MEP fastening applications while the zinc finish provides a layer of protection suited to interior construction environments.
• Optimized pin geometry (.125 in. diameter, 1 in. length) - the pin dimensions are matched to the clamp assembly for reliable drive depth and holding performance in approved concrete applications.

Why This Product

• Speeds up high-volume conduit runs - because the clamp and pin arrive fully preassembled, installers spend less time handling individual components and more time driving fasteners, which directly reduces labor on large MEP projects.
• One assembly, two tool platforms - compatibility with both gas-actuated and powder-actuated tools means crews are not locked into a single tool type, making this clamp a practical fit for contractors who work across a variety of concrete and steel substrates.
• Purpose-built for 1/2 in. conduit MEP work - the clamp is engineered specifically for securing 1/2 in. conduit to concrete, so there is no guesswork about sizing or application suitability in standard mechanical, electrical, and plumbing installations.
• Trusted Simpson design - the product carries the Simpson brand, a name with deep roots in structural and MEP fastening, giving contractors confidence in consistent quality and performance across each fastener in the pack.

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: GCL50-R50
• Material: Carbon Steel
• Finish: Zinc
• Pin Diameter: .125"
• Pin Length: 1"
• Head Diameter: .300"
• Conduit Size: 1/2"
• Quantity per Pack: 50

Approved Applications

• Securing 1/2" conduit to concrete surfaces in mechanical, electrical, and plumbing (MEP) installations
• High-volume fastening projects requiring rapid, consistent deployment of conduit clamps
• Fastening into standard concrete using gas-actuated concrete nailer tools
• Fastening into harder substrates such as structural steel or extra-hard concrete using common powder-actuated tools

What's Included

• 50 x Simpson Strong-Tie GCL50 preassembled conduit clamp fasteners (1/2" clamp, 1" x .125" smooth-shank pin)

Frequently Asked Questions

What size conduit does the GCL50 clamp fit?

The GCL50 is designed to secure 1/2" conduit. The clamp is sized specifically for this diameter, making it a dedicated fastener for standard half-inch conduit runs in MEP applications.

What tools are compatible with this conduit clamp assembly?

The GCL50 is compatible with gas-actuated concrete nailer tools as well as common powder-actuated tools. The powder-actuated tool compatibility makes it suitable for fastening into harder substrates, including structural steel and extra-hard concrete.

Does this product arrive preassembled, or does it require assembly before use?

The GCL50 arrives fully preassembled, combining the smooth-shank pin and cold-formed steel clamp in one ready-to-install unit. No assembly is required on the job site, which helps speed up workflow during high-volume fastening applications.

What material and finish is the GCL50 clamp made from?

The GCL50 features a cold-formed steel clamp paired with a smooth-shank carbon steel pin. Both components carry a zinc finish, which provides a protective coating suited for indoor MEP installations.