The Simpson Opti-Mesh 3-1/2 in. Epoxy Adhesive Plastic Screen Tube for 3/8 in. Rod from Simpson Strong-Tie is engineered to make adhesive anchoring in hollow base materials - such as hollow block and brick - reliable and efficient. Featuring a woven mesh insert, this plastic screen tube delivers superior adhesive flow control compared to steel screen tubes and competitive plastic screen tubes, while maintaining an economical advantage. Designed exclusively for use with the SET-3G epoxy adhesive formulation, it ensures proper anchor performance in demanding construction and fastening applications.

Key Features

• Integral cap centers the rod and displays drill bit and rod diameter - takes the guesswork out of installation, helping crews work accurately and consistently in the field.
• Flanges prevent the screen tube from slipping into over-drilled holes - protects against a common installation error, keeping the tube properly positioned even when the hole is slightly deeper than required.
• Formula-specific woven mesh design controls flow of adhesive out of the screen - ensures the correct amount of epoxy reaches the anchor zone, supporting consistent bond strength and anchor performance.
• Open-mesh collar allows extra adhesive flow in hollow block applications - promotes thorough adhesive distribution around the rod in voids and hollow cavities, where standard anchoring methods fall short.
• Designed exclusively for use with the SET-3G epoxy formulation - using the matched adhesive and screen tube together ensures the system performs as engineered and avoids compatibility issues that could compromise the anchor.

Why This Product

• Plastic construction with performance that exceeds steel alternatives - the Opti-Mesh woven mesh insert gives this plastic screen tube superior adhesive flow control compared to both steel screen tubes and competing plastic options, so buyers get better results without paying a premium for steel.
• Purpose-built for hollow base materials - the open-mesh collar and woven mesh design work together to manage adhesive distribution in voids and hollow cavities, making this screen tube the right tool for hollow block and brick anchoring applications.
• Engineered details reduce installation errors on the job - the integral cap that centers the rod and identifies the correct drill bit and rod diameter, combined with flanges that prevent tube slippage in over-drilled holes, means fewer costly mistakes and faster, more confident installations.
• A Simpson Strong-Tie accessory built to match their adhesive system - as a formula-specific component designed to pair with SET-3G epoxy adhesive, this screen tube is part of a cohesive anchoring system backed by one of the most trusted names in structural fastening.

Specifications

• MPN: 3GWS373P
• Brand: Simpson Strong-Tie
• Material: Plastic
• Bolt/Rod Diameter: 3/8 in.
• Hole Size: 9/16 in.
• Length: 3-1/2 in.
• Color: Gray
• Compatible Adhesive: SET-3G Epoxy Formulation
• Packaging: Packs of 1 and Cartons of 150
• Country of Origin: United States

Frequently Asked Questions

What adhesive formulation is this screen tube compatible with?

This screen tube is designed specifically for use with the SET-3G epoxy adhesive 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 and hole size does this screen tube accommodate?

This screen tube is designed for a 3/8 in. rod diameter and requires a 9/16 in. hole size for proper installation.

Why is a screen tube necessary when using adhesive anchors in hollow block or brick?

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 Opti-Mesh screen tube's woven mesh insert controls the flow of adhesive out of the screen, while the open-mesh collar allows extra adhesive flow in hollow block applications to ensure a proper anchor bond.

What prevents this screen tube from falling into an over-drilled hole?

The screen tube features flanges that prevent it from slipping into over-drilled holes, and an integral cap that centers the rod while displaying the correct drill bit and rod diameter for easy, accurate installation.

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