The Simpson 1/4 in. x 1 in. Zinc Nailon Pin-Drive Anchor is a light-duty mechanical fastener from Simpson engineered for reliable performance under static loads in concrete, grouted CMU, hollow CMU, and brick. Installation is straightforward: set the anchor into a pre-drilled 1/4 in. hole and strike the mushroom head with a hammer to drive the Type 304 stainless-steel pin through the anchor body, expanding it outward and locking it firmly in place. The result is a cost-effective, tamper-resistant fastening solution trusted by specifiers and contractors across a wide range of structural applications.

Key Features

• Tamper-resistant pin and head configuration - the engineered pin and head design discourages unauthorized removal once the anchor is fully set, making it well-suited for exposed or semi-public installations
• Mushroom head design - provides a low-profile, secure finish that sits flush against the surface for a clean, unobtrusive result
• Type 304 stainless-steel pin - delivers strong corrosion resistance compared to standard carbon-steel pins, extending the anchor's service life in moderately corrosive environments
• Pin-drive installation method - a single hammer blow sets the anchor quickly and without specialty tools, reducing installation time and labor on the job site
• Broad base-material compatibility - rated for use in concrete, grouted CMU, hollow CMU, and brick, giving contractors a single anchor solution across multiple substrate types

Why This Product

• Proven Simpson engineering at a low cost - the Zinc Nailon design gives buyers access to a Simpson-engineered mechanical anchor built for light-duty static-load applications without overspending on heavier-duty hardware than the job requires
• Built-in tamper resistance without added hardware - the specific pin and head configuration resists tampering once set, eliminating the need for secondary security measures in installations where unauthorized removal is a concern
• Versatile across common masonry substrates - compatibility with concrete, grouted and hollow CMU, and brick means one anchor part number covers a wide range of typical commercial and residential fastening scenarios
• Fast, tool-friendly installation - the hammer-driven pin-drive method requires no torque wrenches or power tools, allowing crews to work efficiently and consistently across high-volume installations

Specifications

• MPN: ZN25100SS
• Brand: Simpson Strong-Tie
• Anchor Type: Zinc Nailon Pin-Drive Anchor
• Diameter: 1/4 in.
• Length: 1 in.
• Head Type: Mushroom Head
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Packaging: Packs of 100 and Cartons of 500
• Country of Origin: United States

Approved Applications

• Concrete base material installations
• Grouted CMU (Concrete Masonry Unit) applications
• Hollow CMU applications
• Brick base material installations
• Light-duty fastening under static loads

Frequently Asked Questions

What base materials is this anchor compatible with?

This anchor is designed to install securely into a variety of base materials, including concrete, grouted and hollow CMU, and brick.

How is the Zinc Nailon Pin-Drive Anchor installed?

Installation is straightforward: place the anchor in a pre-drilled 1/4 in. hole, then strike the head with a hammer to drive the pin through the anchor body. This expands the anchor body outward, locking it firmly in the base material.

Why is this anchor considered tamper resistant?

The specific pin and head configuration of this anchor is engineered to make it tamper resistant, reducing the risk of unauthorized removal once the anchor is fully set.

What type of loads is this anchor rated for?

This is a low-cost anchor intended for light-duty applications under static loads. It is not designed for use in overhead applications.

Note: Product dimensions and/or thread length may differ from picture. Please see the item description above for specifications.