The Simpson Zinc Nailon 1/4 in. x 2-1/2 in. Stainless-Steel Pin-Drive Anchor from Simpson Strong-Tie is a reliable, low-cost mechanical anchor built for light-duty fastening under static loads. Engineered to install quickly and securely into concrete, grouted CMU, hollow CMU, and brick, this anchor suits a broad range of everyday construction and fastening tasks where a dependable, no-fuss hold is required. The Type 304 stainless-steel pin pairs with the zinc Nailon anchor body to deliver corrosion-resistant performance, while the mushroom head design keeps the finished installation clean and tamper resistant.

Key Features

• Type 304 stainless-steel pin - provides enhanced corrosion resistance, making this anchor suitable for environments where moisture exposure is a concern.
• Tamper-resistant pin and mushroom head configuration - deters unauthorized removal once installed, adding a layer of security in accessible or public-facing applications.
• Mushroom head design - sits flush and clean against the surface, producing a neat, professional finish without requiring additional hardware.
• Zinc Nailon anchor body - delivers a cost-effective solution for light-duty static load applications without sacrificing reliable holding performance.
• Compatible with multiple base materials - works in concrete, grouted CMU, hollow CMU, and brick, giving contractors flexibility across a variety of job-site conditions.
• Simple hammer-drive installation - drill, insert, and strike to expand the anchor body and lock it in place, reducing installation time and the need for specialized tools.

Why This Product

• Trusted engineering from Simpson Strong-Tie - specifiers and contractors rely on Simpson Strong-Tie mechanical anchors for consistent performance in demanding structural and light-duty applications alike, making this a proven choice for pin-drive anchor needs.
• Corrosion-resistant construction for longer service life - the Type 304 stainless-steel pin resists rust and degradation in moisture-prone settings, reducing the risk of anchor failure over time compared to standard carbon-steel alternatives.
• Tamper-resistant design for added installation security - the unique pin and mushroom head geometry makes unauthorized removal difficult, a practical advantage in publicly accessible areas or security-sensitive installations.
• Broad base material compatibility at a low cost - approved for use in concrete, grouted and hollow CMU, and brick, this anchor handles diverse substrate conditions while remaining an economical option for light-duty static load fastening.

Specifications

• Brand: Simpson Strong-Tie
• MPN: ZN25212SS
• Anchor Type: Zinc Nailon Pin-Drive Anchor
• Diameter: 1/4 in.
• Length: 2-1/2 in.
• Head Type: Mushroom Head
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Packaging: Packs of 100 and Cartons of 400
• Country of Origin: United States

Approved Applications

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

Frequently Asked Questions

How is the Simpson ZN25212SS pin-drive anchor installed?

Installation is straightforward: drill a 1/4 in. hole in the base material, insert the anchor, then strike the head with a hammer to drive the pin through the body. This action expands the anchor body, locking it securely in place within the base material.

What base materials is the ZN25212SS compatible with?

This anchor is designed for use in concrete, grouted CMU, hollow CMU, and brick base materials, making it versatile for a range of light-duty construction and fastening applications.

Why does the ZN25212SS feature a Type 304 stainless-steel pin?

The Type 304 stainless-steel pin provides enhanced corrosion resistance compared to standard carbon steel pins, making it suitable for environments where moisture or corrosion exposure is a concern.

Is the mushroom head design on the ZN25212SS tamper resistant?

Yes. The specific pin and mushroom head configuration of this Zinc Nailon anchor is engineered to be tamper resistant, helping ensure the anchor remains securely in place once installed.

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