The Simpson Opti-Mesh 3-1/2 in. Epoxy Adhesive Plastic Screen Tube for 1/2 in. Rod is an engineered plastic screen tube built specifically for use with the Simpson Strong-Tie SET-3G epoxy adhesive formulation. Featuring a woven mesh insert, this screen tube is essential for achieving reliable adhesive anchor performance in hollow or void-containing base materials such as hollow block and brick - delivering the economical advantages of a plastic construction while providing superior performance to steel screen tubes and competitive plastic screen tubes.

Key Features

• Integral cap centers the rod and displays drill bit and rod diameter - removes guesswork during installation, helping ensure correct alignment and reducing costly setup errors on the job.
• Flanges prevent the screen tube from slipping into over-drilled holes - keeps the tube properly positioned even when hole depth is slightly inconsistent, protecting anchor integrity.
• Formula-specific woven mesh design controls flow of adhesive out of the screen - regulates adhesive distribution precisely for consistent, reliable embedment strength in anchoring applications.
• Open-mesh collar allows extra adhesive flow in hollow block applications - accommodates the unique demands of hollow-core and void-containing masonry, ensuring adequate fill where it matters most.
• Designed exclusively for use with SET-3G epoxy adhesive - formula-matched construction means this tube works in concert with the adhesive chemistry, maintaining performance standards and preventing incompatibility issues.

Why This Product

• Outperforms steel and competing plastic screen tubes - the Opti-Mesh woven mesh insert is engineered to deliver superior adhesive anchor performance compared to both steel screen tubes and other plastic alternatives, giving installers greater confidence in hollow-base-material applications.
• Purpose-built for hollow masonry anchoring - the combination of an open-mesh collar and formula-specific mesh design makes this screen tube particularly well suited for hollow block and brick, where controlling adhesive flow is critical to a secure anchor.
• Installer-friendly design reduces errors - the integral cap that displays drill bit and rod diameter, paired with flanges that prevent the tube from dropping into over-drilled holes, helps crews work faster and more accurately without relying on additional reference tools.
• Plastic construction offers an economical advantage without sacrificing performance - buyers get a cost-effective screen tube solution that does not require stepping up to more expensive steel options to achieve dependable results with SET-3G epoxy adhesive.

Specifications

• Manufacturer Part Number (MPN): 3GWS503P
• Brand: Simpson Strong-Tie
• Compatible Adhesive: SET-3G (Epoxy)
• Rod Diameter: 1/2 in.
• Hole Size: 3/4 in.
• Length: 3-1/2 in.
• Material: Plastic
• Color: Gray
• Packaging: Packs of 1 and Cartons of 100
• Country of Origin: United States

Frequently Asked Questions

What adhesive formulation must be used with this screen tube?

This Opti-Mesh screen tube is designed specifically for use with the Simpson Strong-Tie SET-3G epoxy adhesive formulation. Screen tubes are formula-specific, and epoxy screen tubes must only be used with SET-3G. Using the wrong adhesive type can compromise anchor performance.

What base materials is this screen tube designed to work in?

This screen tube is vital to the performance of adhesive anchors in base materials that are hollow or contain voids, such as hollow block and brick. The open-mesh collar allows extra adhesive flow specifically for hollow block applications.

What rod and hole size does this screen tube accommodate?

This screen tube is designed for a 1/2 in. rod diameter and requires a 3/4 in. drilled hole. The integral cap displays the drill bit and rod diameter for easy reference during installation.

How does the Opti-Mesh design compare to steel screen tubes?

The Simpson Strong-Tie Opti-Mesh screen tube with woven mesh insert provides the economical advantage of a plastic screen tube while delivering superior performance to steel screen tubes and competitive plastic screen tubes. The formula-specific woven mesh design precisely controls the flow of adhesive out of the screen for consistent results.

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