The Simpson Easy-Set 1/2 in. x 3-1/2 in. Pin-Drive Expansion Anchor is a carbon steel fastener engineered for medium- and heavy-duty anchoring into concrete base materials, including concrete masonry unit (CMU) and brick. Built by Simpson, this pin-drive anchor delivers reliable holding power through mechanical expansion, and its yellow-zinc dichromate plated finish provides corrosion resistance suited to demanding construction environments. The integrated nut and washer design keeps all hardware together and simplifies installation, making it a practical choice for structural fastening applications where consistent, repeatable results matter.

Key Features

• Integrated nut and washer - keeps all components together as a single unit, reducing the risk of lost hardware and speeding up installation on the job site
• Pin-drive expansion mechanism - sets the anchor through controlled expansion in the base material, creating a strong, load-bearing connection to concrete, CMU, or brick
• Yellow-zinc dichromate plated carbon steel construction - delivers the structural strength needed for medium- and heavy-duty fastening while the plated finish adds a layer of corrosion resistance
• Compatible with concrete, CMU, and brick - covers a broad range of masonry base materials, making this anchor versatile across multiple structural applications
• 3/4 in. wrench installation - standard wrench size keeps the installation process straightforward without requiring specialized tooling
• Precise 1/2 in. drill bit requirement - matching the drill bit diameter exactly to the anchor size is critical; a properly sized hole ensures full expansion and maximum load capacity

Why This Product

• Simplified jobsite handling - the all-in-one integrated nut and washer means fewer loose parts to manage, which saves time and reduces errors during medium- and heavy-duty concrete fastening work
• Broad base material compatibility - engineered to perform in concrete, CMU, and brick, this expansion anchor addresses a wide range of masonry anchoring needs without requiring multiple product SKUs
• Dependable holding power through mechanical expansion - the pin-drive expansion design provides a strong, reliable connection that supports structural fastening applications where load capacity cannot be compromised
• Trusted Simpson engineering - Simpson has a well-established reputation in structural connectors and anchoring systems, giving contractors and builders confidence that this anchor meets the demands of real construction applications

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: EZAC50312
• Material: Carbon Steel
• Coating / Finish: Yellow-Zinc Dichromate Plated
• Diameter: 1/2 in.
• Length: 3-1/2 in.
• Thread Length: 1-1/8 in.
• Drill Bit Diameter: 1/2 in.
• Minimum Fixture Hole: 9/16 in.
• Wrench Size: 3/4 in.
• Packaging: Packs of 25 and Cartons of 125

Approved Applications

• Medium-duty fastening into concrete
• Heavy-duty fastening into concrete
• Fastening into concrete masonry unit (CMU)
• Fastening into brick base materials
• Structural connections requiring expansion anchor holding power

Frequently Asked Questions

What size drill bit is required to install the EZAC50312 anchor?

The EZAC50312 requires a 1/2 in. drill bit to prepare the hole in the base material. It is important to avoid oversizing the hole, as oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity.

What base materials is the Simpson EZAC50312 compatible with?

The EZAC50312 Easy-Set anchor is designed for use in concrete base materials, including concrete masonry unit (CMU) and brick, making it suitable for a wide range of medium- and heavy-duty masonry fastening applications.

What wrench size is needed to install this expansion anchor?

A 3/4 in. wrench is required to install the EZAC50312. The anchor's integrated nut and washer design eliminates the need to manage separate hardware components during installation.

What is the minimum fixture hole size for the EZAC50312?

The minimum fixture hole size for the EZAC50312 is 9/16 in. This specification ensures proper engagement of the anchor with the fixture being fastened to the base material.

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