The Simpson 6X Adjustable Post Cap in ZMAX Finish is an 18-gauge steel connector engineered to create a positive, secure connection between the top of a 6x post and a beam. Designed for both new construction and retrofit applications where structural support is needed, this connector eliminates the weaknesses associated with end-grain nailing and delivers a stronger joint than angled nailing or screw fastening alone. The ZMAX galvanized finish provides extra corrosion resistance, making it a dependable choice for exterior builds and projects involving treated lumber. Per Simpson installation requirements, these post caps are always installed in pairs.

Key Features

• Eliminates nailing into end grains - removes a common weak point in post-to-beam connections, resulting in a cleaner and more structurally reliable joint
• Stronger than angled nailing or screw fastening - provides a more secure connection method, reducing the risk of joint failure under load
• For use with nominal 6x lumber - sized specifically for 6x posts so the cap fits correctly without modification or guesswork on the job site
• Made from 18-gauge steel - offers the rigidity and load-handling capacity expected from a structural post cap connector
• ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications - stands up to the corrosive properties of pressure-treated lumber and outdoor exposure better than standard galvanized finishes
• Always installed in pairs - ensures a balanced, positive connection between beam and post as required by Simpson design specifications

Why This Product

• Built for treated-wood and outdoor projects - the ZMAX galvanized coating is specifically suited for exterior applications and contact with treated lumber, giving builders confidence that the connector won't prematurely corrode in demanding environments
• A stronger connection method by design - by replacing angled nailing and end-grain fastening with a purpose-built steel connector, this post cap delivers a structurally superior beam-to-post joint that holds up under real load conditions
• Versatile fit for new and retrofit work - the adjustable design makes this cap a practical solution whether you're framing new construction or reinforcing an existing post-to-beam connection on an older structure
• Trusted Simpson engineering - manufactured in the United States from 18-gauge steel, this connector reflects the same design standards that have made Simpson post caps a go-to choice for contractors and builders on structural framing projects

Specifications

• Model Number (MPN): AC6Z
• Gauge: 18
• Length: 8-1/2 in.
• Member Size: 6x
• Width: 5-1/2 in.
• Coating/Finish: ZMAX
• Install With: 0.162 in. x 3-1/2 in. nails or #10 x 1-1/2 in. Strong-Drive SD screws (sold separately)
• Country of Origin: United States

Frequently Asked Questions

What size lumber is the AC6Z post cap designed for?

The AC6Z is designed for use with nominal 6x lumber, providing a secure and positive connection between the top of a 6x post and a beam.

What fasteners are required to install the AC6Z post cap?

The AC6Z is approved for installation with 0.162 in. x 3-1/2 in. nails or #10 x 1-1/2 in. Strong-Drive SD screws.

Why is the ZMAX finish important for this post cap?

The ZMAX galvanization provides extra corrosion resistance, making the AC6Z especially suitable for exterior applications and use with treated wood where standard finishes may be insufficient.

Do these post caps need to be installed in pairs?

Yes. The AC series post caps are always installed in pairs to ensure a positive and structurally sound connection between the beam and the post.

Note: Product dimensions and/or nail or screw holes may differ from picture. Please see item description for specifications.