The Simpson 1/4 in. x 3 in. Zinc Nailon Pin-Drive Anchor from Simpson is a light-duty mechanical fastener engineered for reliable, low-cost performance under static loads in a range of masonry base materials. Trusted by specifiers and contractors in demanding structural applications, this hammer-set anchor installs quickly into a pre-drilled 1/4 in. hole in concrete, grouted CMU, hollow CMU, or brick - expanding upon pin drive to grip firmly and hold securely in place. The Type 304 stainless-steel pin and tamper-resistant head configuration make it a practical choice wherever security and corrosion resistance are priorities.

Key Features

• Tamper-resistant pin and head configuration - deters unauthorized removal, making this anchor well-suited for secure or publicly accessible installations
• Mushroom head design - provides a low-profile, broad seating surface that distributes load evenly and sits flush for a clean finished appearance
• Type 304 stainless-steel pin - delivers enhanced corrosion resistance compared to standard carbon steel, extending service life in moisture-exposed or corrosion-prone environments
• Zinc Nailon anchor body - purpose-built for light-duty fastening under static loads, offering a cost-effective solution without sacrificing reliable holding performance
• Compatible with multiple masonry base materials - approved for use in concrete, grouted CMU, hollow CMU, and brick, giving contractors flexibility across a wide range of job-site conditions
• Simple hammer-set installation - no special tools required; insert into a pre-drilled hole and strike the head to expand the anchor, reducing installation time and labor costs

Why This Product

• Cost-effective light-duty anchoring from a trusted name - Simpson Zinc Nailon anchors are specifically designed to keep material costs low on static-load applications while meeting the performance expectations that specifiers and contractors rely on Simpson for
• Built-in tamper resistance protects your installation - the pin and head geometry actively resist unauthorized removal, making this pin-drive anchor a smart choice for signage, fixtures, and other installations in accessible or high-traffic areas
• Stainless-steel pin for longer service life - the Type 304 stainless-steel pin resists corrosion in environments where standard carbon-steel fasteners would degrade, helping reduce the risk of premature anchor failure
• Versatile masonry compatibility simplifies procurement - with approval across concrete, grouted CMU, hollow CMU, and brick, one anchor covers multiple base materials on the same project, streamlining ordering and reducing the need to stock multiple fastener types

Specifications

• MPN: ZN25300SS
• Brand: Simpson Strong-Tie
• Anchor Type: Zinc Nailon Pin-Drive Anchor
• Diameter: 1/4 in.
• Length: 3 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 fastening under static loads

Frequently Asked Questions

How is the Simpson ZN25300SS 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 pin through the anchor body, expanding it against the base material to hold it securely in place.

What base materials is the ZN25300SS compatible with?

This anchor is designed for use in concrete, grouted CMU, hollow CMU, and brick. It is a versatile light-duty fastener suitable for a variety of masonry base materials under static loads.

What makes this anchor tamper resistant?

The pin and head configuration of the Zinc Nailon anchor is specifically designed to be tamper resistant, making it suitable for applications where security and resistance to unauthorized removal are important considerations.

What material is the pin made from, and why does it matter?

The pin is made from Type 304 stainless steel, which offers enhanced corrosion resistance compared to standard carbon steel. This makes the ZN25300SS a better choice for environments where moisture or corrosive conditions may be present.

Note: Product dimensions and/or thread length may differ from picture. Please refer to the specifications listed above for accurate product details.