The Simpson 1/4 in. x 1 1/2 in. Zinc Nailon Pin-Drive Anchor in Type 304 Stainless Steel is a reliable, low-cost mechanical anchor from Simpson built for light-duty fastening under static loads. Designed to install quickly into concrete, grouted CMU, hollow CMU, and brick, this pin-drive anchor seats with a single hammer strike to the mushroom head, driving the stainless-steel pin through the anchor body to expand and lock it firmly in place. Specifiers and contractors trust Simpson mechanical anchors for dependable performance across a wide range of base materials and demanding job-site conditions.

Key Features

• Pin and head configuration makes the anchor tamper resistant - once set, the anchor resists removal without damaging the base material, making it a smart choice for securing fixtures in accessible or public-facing installations.
• Mushroom head design - distributes the hammer-strike force evenly across the anchor face for a clean, flush-set installation that sits securely against the surface.
• Type 304 stainless-steel pin - provides good corrosion resistance and durability, extending the anchor's service life in environments with moisture or mild corrosive conditions.
• Zinc Nailon anchor body - expands reliably within the base material upon pin-drive installation, delivering a secure hold in concrete, grouted CMU, hollow CMU, and brick.
• Simple hammer-drive installation - requires no special tools beyond a standard hammer, reducing installation time and labor costs on the job site.
• Made in the United States by Simpson - backed by a brand that specifiers and contractors trust for consistent quality and performance in structural and light-duty fastening applications.

Why This Product

• Cost-effective solution for light-duty anchoring - the Zinc Nailon pin-drive design delivers reliable holding strength in concrete and masonry base materials at a low per-anchor cost, making it practical for projects where large quantities of anchors are needed.
• Versatile across multiple base materials - approved for use in concrete, grouted CMU, hollow CMU, and brick, this anchor reduces the need to stock multiple anchor types for different substrates on the same job.
• Built-in tamper resistance adds security - the unique pin and head configuration makes the anchor difficult to remove once driven, offering added peace of mind for installations in shared or publicly accessible spaces.
• Trusted Simpson engineering for consistent field performance - Simpson mechanical anchors are designed for optimum performance under demanding structural applications, giving contractors and specifiers confidence in the product's reliability across static-load fastening scenarios.

Specifications

• MPN: ZN25112SS
• Brand: Simpson Strong-Tie
• Anchor Type: Zinc Nailon Pin-Drive Anchor
• Diameter: 1/4 in.
• Length: 1-1/2 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
• Grouted CMU (Concrete Masonry Unit)
• Hollow CMU
• Brick
• Light-duty static load applications

Frequently Asked Questions

How is the Simpson ZN25112SS Zinc Nailon anchor installed?

The anchor is installed by placing it into a pre-drilled 1/4 in. hole in the base material and striking the mushroom head with a hammer. This drives the stainless-steel pin through the anchor body, causing it to expand and lock securely in place.

What base materials is this anchor compatible with?

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

Why is this anchor considered tamper resistant?

The pin and head configuration of the Zinc Nailon anchor is specifically designed to make it tamper resistant. Once the pin is driven and the anchor is set, it cannot be easily removed without damaging the base material.

What type of stainless steel is used in the ZN25112SS pin?

The pin is made from Type 304 stainless steel, which provides good corrosion resistance and durability, making it suitable for environments where moisture or mild corrosive conditions may be present.

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