Simpson 1/4 in. x 2-1/2 in. Zinc Nailon Pin-Drive Anchor by Simpson is a low-cost, light-duty mechanical anchor built for fast, dependable installation in concrete, grouted CMU, hollow CMU, and brick. Driven into place with a simple hammer strike, the carbon steel pin expands the anchor body outward to create a firm, locked hold under static loads - making it a trusted choice for contractors and specifiers who need a reliable fastening solution without unnecessary complexity.

Key Features

• Tamper-resistant pin and head configuration - once installed, the anchor resists removal or backing out without specialized tools, adding a layer of security to finished installations
• Mushroom head design - provides a low-profile, flush-finishing result that keeps installed surfaces clean and snag-free
• 1/4 in. x 2-1/2 in. sizing - sized for use with a standard 1/4 in. drill bit, simplifying tool selection and keeping the installation process straightforward
• Carbon steel pin construction - delivers consistent strength and reliable holding power for light-duty static load applications
• Compatible with multiple base materials - approved for use in concrete, grouted CMU, hollow CMU, and brick, giving installers flexibility across a range of common substrates

Why This Product

• Engineered by a trusted name in mechanical anchors - Simpson mechanical anchors are a go-to choice for specifiers and contractors working across demanding structural applications, backed by a brand with a long record in fastening solutions
• Simple hammer-drive installation - no specialty installation tools required; a standard hammer strike to the mushroom head is all it takes to expand and set the anchor, saving time on the job
• Broad substrate compatibility - a single anchor type works across concrete, grouted CMU, hollow CMU, and brick, reducing the need to source multiple anchor styles for mixed-material projects
• Cost-effective solution for light-duty work - the Zinc Nailon anchor is specifically designed as a low-cost option for static load applications, helping keep material budgets in check without sacrificing a secure hold

Specifications

• MPN: ZN25212
• Brand: Simpson Strong-Tie
• Anchor Type: Zinc Nailon Pin-Drive Anchor
• Diameter: 1/4 in.
• Length: 2-1/2 in.
• Head Type: Mushroom Head
• Material: Carbon 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 static load applications

Frequently Asked Questions

How is the Simpson ZN25212 Zinc Nailon anchor installed?

Installation is straightforward: strike the mushroom head with a hammer to drive the carbon steel pin through the anchor body. This action expands the anchor body outward, locking it securely into the base material.

What base materials is this anchor compatible with?

The ZN25212 is designed for use in concrete, grouted CMU, hollow CMU, and brick base materials.

Is this anchor suitable for overhead applications?

No. This anchor is not approved for use in overhead applications. It is intended for light-duty applications under static loads only.

What makes this anchor tamper resistant?

The pin and head configuration of the Zinc Nailon anchor is specifically designed to resist tampering. Once the pin is driven and the anchor body expands, the anchor cannot be easily removed or backed out without specialized tools.

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