The Simpson Adhesive Retaining Cap for 3/8-inch Anchors is a plastic cap engineered to make overhead, upwardly inclined, and horizontal anchor installations easier and more precise. Designed by Simpson Strong-Tie, it prevents anchoring adhesive from running out of the drilled hole while automatically centering the threaded rod or rebar dowel during insertion - making it an essential accessory wherever accurate anchor placement is critical. Compatible with any Simpson Strong-Tie anchoring adhesive, this cap is equally suited for standard horizontal applications and demanding overhead or deep embedment work.

Key Features

• Slit-through cap design - allows the threaded rod or rebar dowel insert to pass through during installation while containing the adhesive inside the hole, so you get a clean, consistent pour every time without waste or mess
• Built-in rod centering - automatically centers the threaded rod or rebar dowel within the drilled hole, helping you achieve precise anchor placement without extra guesswork or adjustment
• Multi-orientation compatibility - designed for overhead, upwardly inclined, and horizontal orientations as well as deep embedments, giving you a single reliable solution across a wide range of jobsite conditions
• Universal adhesive compatibility - works with any Simpson Strong-Tie anchoring adhesive, so you are not locked into a single product and can use the cap alongside your existing adhesive system
• Piston Plug Delivery System compatible - may be used in conjunction with the Simpson Strong-Tie Piston Plug Delivery System, integrating smoothly into an organized, efficient anchor installation workflow

Why This Product

• Solves the overhead adhesive problem - gravity works against you in overhead and upwardly inclined anchor installations, and this cap directly addresses that challenge by containing the adhesive in the hole so it cures where it needs to, not on the floor or your hands
• Improves placement accuracy - the centering function removes a common source of installation error, making this cap especially valuable on projects where precise anchor positioning is required for structural or code compliance reasons
• Broad application range in one accessory - because it is rated for overhead, inclined, horizontal, and deep embedment use, a single cap model handles the varied anchor conditions found on most commercial and residential jobsites
• Flexible adhesive pairing - compatibility with any Simpson Strong-Tie anchoring adhesive means you can standardize on this cap regardless of which adhesive product your project calls for, reducing the need to stock multiple accessory types

Specifications

• Model Number: ARC37A-RP25
• Bolt/Rod Diameter: 3/8 in.
• Hole Diameter: 7/16 in.
• Drill Bit Diameter: 7/16 in.
• Material: Plastic
• Packaging: Packs of 25 and Cartons of 200
• Country of Origin: United States

Approved Applications

• Overhead anchor installations requiring adhesive containment and rod support during cure
• Upwardly inclined anchor installations
• Horizontal anchor installations
• Deep embedment applications
• Applications requiring precise anchor placement and centered rod or rebar dowel positioning
• Use in conjunction with the Simpson Strong-Tie Piston Plug Delivery System

Frequently Asked Questions

What is the purpose of the slit design on the adhesive retaining cap?

The slit in the cap allows the threaded rod or rebar dowel insert to pass through during installation while still containing the adhesive inside the drilled hole. This prevents the adhesive from running out, which is especially important in overhead and upwardly inclined orientations.

Can the adhesive retaining cap support the weight of the anchor during an overhead installation?

No. Adhesive retaining caps are not designed to support the weight of the anchor. For overhead installations, it is advisable to provide an adequate means of anchor support during cure time to ensure proper adhesive performance.

Is this cap compatible with all Simpson Strong-Tie anchoring adhesives?

Yes. The ARC37A-RP25 works with any Simpson Strong-Tie anchoring adhesive, making it a versatile accessory across a wide range of adhesive anchor systems.

Can the ARC37A-RP25 be used with the Simpson Strong-Tie Piston Plug Delivery System?

Yes. ARC retaining caps may be used in conjunction with the Simpson Strong-Tie Piston Plug Delivery System, allowing for a complete and efficient adhesive anchor installation workflow.

Note: Adhesive retaining caps are not designed to support the weight of the anchor in overhead installations. It is advisable to provide an adequate means of anchor support during cure time.