The Simpson 6x Adjustable Post Cap is a structural connector engineered to create a positive, load-bearing connection between the top of a 6x post and a beam. Built from 18-gauge steel with a G90 zinc galvanized coating, this post cap gives builders and contractors a reliable solution for securing beam-to-post connections in both new construction framing and retrofit situations where additional structural support is required. Per Simpson design requirements, the AC series connector is always installed in pairs to deliver a balanced, dependable connection on both sides of the post.

Key Features

• Eliminates nailing into end grains - removes a common weak point in post-to-beam connections, resulting in a cleaner, more structurally sound assembly
• Stronger than angled nailing or screw fastening - provides a more positive mechanical connection than traditional field methods, giving builders greater confidence in the joint's load-carrying performance
• Designed for nominal 6x lumber - sized specifically for 6x posts and beams, so the connector fits correctly without guesswork or field modification
• 18-gauge steel construction - delivers the rigidity and strength expected of a structural post cap while keeping the connector lightweight enough for straightforward handling during installation
• G90 zinc galvanized coating - the enhanced corrosion-resistant finish helps protect the connector in environments where moisture exposure is a concern, supporting long-term connection integrity
• Suitable for new construction and retrofit applications - versatile enough to be used on fresh framing or added to an existing post-and-beam assembly where a stronger connection is needed

Why This Product

• A mechanically superior alternative to traditional fastening methods - by eliminating end-grain nailing and outperforming angled nailing or screw-only approaches, this post cap delivers a more structurally reliable beam-to-post connection that meets the demands of load-bearing applications
• Built for corrosion resistance in real-world conditions - the G90 galvanized finish provides a meaningful layer of protection against moisture and the elements, making this connector a practical choice for covered outdoor structures, pergolas, and decks where uncoated steel could degrade over time
• Trusted Simpson engineering for new builds and upgrades alike - the adjustable design works for both new construction framing and retrofit scenarios, giving contractors and DIYers the flexibility to strengthen 6x post-and-beam connections regardless of project stage
• Always installed in pairs for balanced structural performance - the paired installation method is built into the AC series design, ensuring the connection is supported evenly on both sides of the post for a more secure and stable final assembly

Specifications

• Model Number: AC6
• Member Size: 6x
• Gauge: 18
• Length: 8-1/2 in.
• Width: 5-1/2 in.
• Coating/Finish: Zinc Galvanized, G90
• 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 AC6 post cap designed for?

The AC6 is designed for use with nominal 6x lumber, providing a secure connection between a 6x post and a beam.

What fasteners are required to install the AC6 post cap?

The AC6 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 G90 galvanized coating important for the AC6?

The G90 zinc galvanized coating provides extra corrosion resistance, making the AC6 better suited for environments where moisture exposure could compromise the integrity of uncoated steel connectors.

Does the AC6 need to be installed in pairs?

Yes. The AC series post caps are always installed in pairs to ensure a positive, balanced connection between the beam and the post on both sides.

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