The Simpson Opti-Mesh 3-1/2 in. Epoxy Adhesive Plastic Screen Tube for 5/8 in. Rod is a purpose-built anchoring accessory from Simpson Strong-Tie designed to maximize the reliability of adhesive anchors in hollow or void-containing base materials such as hollow block and brick. Featuring a woven mesh insert, this plastic screen tube delivers the cost efficiency of a plastic construction while offering superior performance compared to steel screen tubes and competitive plastic screen tubes. Engineered exclusively for use with the SET-3G epoxy formulation, it gives contractors and installers a precise, controlled adhesive dispensing solution for 5/8 in. rod installations.

Key Features

• Integral cap centers the rod and displays drill bit and rod diameter - gives installers an instant visual reference during placement, reducing the risk of sizing errors on the job.
• Flanges prevent the screen tube from slipping into over-drilled holes - keeps the tube properly positioned even when hole depth varies, protecting installation integrity.
• Formula-specific woven mesh design controls flow of adhesive out of the screen - ensures consistent adhesive distribution for a complete, reliable bond around the anchor rod.
• Open-mesh collar allows extra adhesive flow in hollow block applications - accommodates the unique demands of hollow block and brick substrates where voids would otherwise compromise bond strength.
• Designed specifically for the SET-3G epoxy formulation - eliminates compatibility guesswork and ensures the mesh material and flow characteristics are optimized for this adhesive chemistry.

Why This Product

• Plastic construction with performance that rivals steel - the Opti-Mesh woven mesh insert bridges the gap between economical plastic screen tubes and higher-cost steel alternatives, making it a practical choice for volume epoxy anchoring work.
• Built-in features actively prevent common installation mistakes - the integral cap with diameter markings and the anti-slip flanges work together to guide correct rod centering and tube positioning, reducing costly rework.
• Optimized specifically for hollow substrates - the open-mesh collar design addresses the real-world challenge of anchoring into hollow block and brick, where standard methods can fail due to adhesive loss into voids.
• Guaranteed compatibility with SET-3G epoxy - using a screen tube matched to the exact adhesive formulation ensures the adhesive performs as intended, supporting the full structural reliability of the anchor system.

Specifications

• MPN: 3GWS623P
• Brand: Simpson Strong-Tie
• Compatible Adhesive: SET-3G (Epoxy)
• Rod Diameter: 5/8 in.
• Hole Size: 7/8 in.
• Length: 3-1/2 in.
• Material: Plastic
• Color: Gray
• Packaging: Packs of 1 and Cartons of 50
• Country of Origin: United States

Frequently Asked Questions

What adhesive must be used with this screen tube?

This Opti-Mesh screen tube is designed specifically for the SET-3G epoxy formulation. Screen tubes are designed for a specific adhesive type, and epoxy screen tubes must be used with the SET-3G formulation only.

What rod diameter is this screen tube compatible with?

This screen tube is designed for a 5/8 in. rod diameter and requires a 7/8 in. drilled hole size for proper installation.

Why are screen tubes necessary for hollow block or brick applications?

Screen tubes are 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 on this Opti-Mesh tube allows extra adhesive flow specifically for hollow block applications, ensuring a complete and reliable bond.

How does the Opti-Mesh screen tube prevent installation errors?

The integral cap centers the rod and displays the drill bit and rod diameter for easy reference, while the flanges prevent the screen tube from slipping into over-drilled holes - both features working together to help ensure a correct and consistent installation.

Note: Product dimensions may differ from picture. Please refer to the specifications listed above for exact dimensions.