The Simpson Adhesive Retaining Cap for 3/4 in. Anchors is a plastic cap engineered by Simpson to make overhead, upwardly inclined, and horizontal adhesive anchor installations more reliable and precise. By preventing adhesive from running out of the drilled hole and centering the threaded rod or rebar dowel during insertion, this retaining cap supports consistent, accurate anchor placement across demanding structural and construction applications - including deep embedments where controlled adhesive retention is critical.

Key Features

• Slit design allows the insert to pass through while containing the adhesive in the hole - keeps adhesive exactly where it needs to be during rod or rebar insertion, so none is wasted and bond integrity is maintained.
• Centers the threaded rod or rebar dowel during insertion into the drilled hole - ensures precise anchor placement every time, which is especially valuable in applications with tight structural tolerances.
• Designed for overhead, upwardly inclined and horizontal orientations as well as deep embedments - gives contractors a single solution that works across the most challenging installation angles without switching accessories.
• Works with any Simpson Strong-Tie anchoring adhesive - broad compatibility means no guesswork matching caps to cartridges, streamlining jobsite inventory and workflow.
• Compatible with the Simpson Strong-Tie Piston Plug Delivery System - integrates directly into an established adhesive anchoring workflow for faster, more controlled installations.

Why This Product

• Solves the core challenge of overhead and inclined adhesive anchoring - gravity works against you in overhead and upwardly inclined holes, and the retaining cap directly counters that by containing the adhesive until the anchor is fully set, reducing failed or wasted installations.
• Doubles as a centering tool - unlike a basic plug, this cap actively centers the rod or rebar dowel in the hole, making it a practical choice any time precise anchor placement matters structurally or aesthetically.
• Versatile across orientations and embedment depths - a single cap design handles overhead, inclined, horizontal, and deep embedment scenarios, so crews can stock one accessory that covers a wide range of adhesive anchoring tasks on the same project.
• Trusted Simpson engineering in a simple, low-cost component - made in the United States and designed to pair with the full Simpson Strong-Tie adhesive anchor lineup, this cap helps protect a much larger investment in adhesive, labor, and structural performance.

Specifications

• Model Number: ARC75A-RP25
• Bolt/Rod Diameter: 3/4 in.
• Hole Diameter: 13/16 in.
• Drill Bit Diameter: 13/16 in.
• Material: Plastic
• Packaging: Packs of 25 and Cartons of 200
• Country of Origin: United States

Approved Applications

• Overhead adhesive anchor installations where adhesive retention in the hole is critical
• Upwardly inclined anchor installations requiring adhesive containment
• Horizontal adhesive anchor installations
• Deep embedment applications requiring centered rod or rebar dowel placement
• Use in conjunction with the Simpson Strong-Tie Piston Plug Delivery System

Frequently Asked Questions

What is the purpose of the slit on the ARC75A adhesive retaining cap?

The slit in the cap allows the threaded rod or rebar dowel insert to pass through the cap during installation while still containing and retaining the adhesive inside the drilled hole. This is especially important in overhead and inclined orientations where gravity would otherwise cause the adhesive to run out.

Can the ARC75A support the weight of the anchor during an overhead installation?

No. 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 the adhesive cure time to ensure a proper, safe installation.

Which anchoring adhesives are compatible with the ARC75A retaining cap?

The ARC75A works with any Simpson Strong-Tie anchoring adhesive, offering broad compatibility across the Simpson Strong-Tie adhesive anchor product line.

Can the ARC75A be used with the Simpson Strong-Tie Piston Plug Delivery System?

Yes. ARC adhesive retaining caps may be used in conjunction with the Simpson Strong-Tie Piston Plug Delivery System, providing a complete and compatible overhead and horizontal anchor installation solution.

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 when performing overhead anchor applications.