The Simpson Adhesive Piston Plug for 9/16 in. Hole Diameter is a precision-fit plastic plug from Simpson engineered for use with the Simpson Strong-Tie Piston Plug Delivery System. Designed to dispense adhesive into drilled holes for threaded rod and rebar dowel installations, this plug features a matched tolerance design that virtually eliminates the formation of voids and air pockets during adhesive dispensing - delivering consistent, reliable results whether working overhead, in upwardly inclined or horizontal orientations, at deep embedments, or in submerged (underwater) concrete conditions. A barbed end provides a reliable connection to the flexible extension tubing, keeping the delivery system secure throughout the pour.

Key Features

• Model number embossed on each plug - makes it easy to confirm you have the correct plug on the jobsite without referencing packaging
• Matched tolerance design - virtually eliminates voids and air pockets during adhesive dispensing, so every installation gets consistent adhesive placement and full coverage around the fastener
• Barbed end connection - provides a reliable, secure fit to the flexible extension tubing, reducing the risk of disconnection mid-installation
• Compatible with any Simpson Strong-Tie concrete anchoring adhesive - gives you flexibility to pair this plug with multiple adhesive products in the Simpson Strong-Tie lineup without compatibility concerns
• Sized specifically for 9/16 in. drilled hole diameter - ensures a proper fit that supports the matched tolerance performance the system depends on
• Designed for demanding installation orientations and embedment depths - performs in overhead, inclined, horizontal, deep embedment, and submerged concrete applications where adhesive control is most critical

Why This Product

• Engineered for the toughest anchoring conditions - because this plug and delivery system are specifically built for overhead, horizontal, deep embedment, and underwater concrete work, contractors get a reliable dispensing solution in precisely the situations where adhesive placement is hardest to control
• Virtually void-free adhesive placement - the matched tolerance fit between plug and drilled hole actively works against the air pockets and voids that can compromise threaded rod and rebar dowel pull strength, giving you greater confidence in bond integrity
• Broad adhesive compatibility without added complexity - working with any Simpson Strong-Tie concrete anchoring adhesive means this plug integrates into your existing anchoring workflow rather than locking you into a single product pairing
• Built-in identification reduces costly mix-ups - the embossed model number on every plug lets crews quickly verify the correct size is in use, a small detail that prevents installation errors when multiple plug sizes are on a job

Specifications

• Manufacturer Part Number (MPN): PP56-RP10
• Brand: Simpson Strong-Tie
• Hole Diameter: 9/16 in.
• Material: Plastic
• Packaging: Packs of 10 and Cartons of 100

Approved Applications

• Overhead adhesive dispensing into drilled holes
• Upwardly inclined and horizontal installation orientations
• Deep embedment applications
• Submerged (underwater) concrete conditions
• Threaded rod and rebar dowel installations

Frequently Asked Questions

What system is the PP56-RP10 designed to work with?

This adhesive piston plug is designed for use with the Simpson Strong-Tie Piston Plug Delivery System, which is used to dispense adhesive into drilled holes for threaded rod and rebar dowel installations.

Which adhesives are compatible with this piston plug?

The PP56-RP10 is compatible with any Simpson Strong-Tie concrete anchoring adhesive, making it a versatile component across multiple Simpson Strong-Tie adhesive product lines.

How does this plug help improve installation quality?

The matched tolerance design between the piston plug and the drilled hole virtually eliminates the formation of voids and air pockets during adhesive dispensing, resulting in consistent and reliable adhesive placement.

Can this plug be used for overhead or submerged installations?

Yes. The piston plug delivery system is specifically designed for dispensing adhesive in overhead, upwardly inclined, and horizontal orientations, as well as deep embedments and submerged (underwater) concrete conditions.

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