The Simpson 1/4 in. x 3 in. Zinc Nailon Pin-Drive Anchor is a light-duty mechanical anchor from Simpson engineered for reliable performance under static loads in concrete, grouted CMU, hollow CMU, and brick. Designed as a low-cost anchoring solution, the Zinc Nailon construction pairs a carbon-steel pin with a mushroom head in a configuration trusted by specifiers and contractors across a wide range of structural applications where straightforward installation and tamper resistance are key priorities.

Key Features

• Tamper-resistant pin and head configuration - once installed, the anchor resists unauthorized removal or manipulation, making it a dependable choice for secured fastening in accessible areas
• Mushroom head design - provides a low-profile, secure finish that sits flush against the surface for a clean, professional result
• 1/4 in. x 3 in. sizing with a 1/4 in. drill bit requirement - pairs directly with a standard 1/4 in. bit for a straightforward, no-guesswork installation process
• Carbon-steel pin - delivers the strength and durability needed to expand the anchor body fully and lock it firmly into the base material
• Simple hammer-drive installation - insert into a pre-drilled hole and strike the head to expand the anchor body instantly, reducing labor time on the job site

Why This Product

• Versatile base material compatibility - approved for use in concrete, grouted CMU, hollow CMU, and brick, this anchor covers the widest range of common masonry substrates without requiring multiple anchor types on a single project
• Built-in tamper resistance at no added cost - the pin-drive design inherently resists tampering once set, giving contractors a security advantage that typically requires a specialized anchor at a higher price point
• Low-cost solution for light-duty static load work - the Zinc Nailon design is specifically engineered to keep material costs down on applications where high-load capacity is not required, making it ideal for budget-conscious projects
• Backed by Simpson engineering and trusted performance - Simpson mechanical anchors are relied on by specifiers and contractors in demanding structural applications, giving buyers confidence in consistent, repeatable results on the job site

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: ZN25300
• Diameter: 1/4 in.
• Length: 3 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 materials
• Grouted CMU (concrete masonry unit)
• Hollow CMU
• Brick
• Light-duty static load applications

Frequently Asked Questions

How is the Simpson ZN25300 Zinc Nailon Pin-Drive Anchor installed?

Installation is straightforward: insert the anchor into a pre-drilled 1/4 in. hole, then strike the head with a hammer. This drives the carbon-steel pin through the anchor body, causing it to expand and lock securely into the base material.

What base materials is this anchor compatible with?

The Zinc Nailon anchor is designed for use in a variety of base materials, including concrete, grouted and hollow CMU, and brick.

What makes this anchor 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 expanded, it cannot be easily removed or manipulated.

What load type is the Simpson ZN25300 rated for?

The ZN25300 Zinc Nailon Pin-Drive Anchor is designed for light-duty applications under static loads. It is not intended for use in overhead applications.

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