The Simpson Adjustable Post Cap for 6x Lumber is a structural connector engineered to create a positive, secure connection between a beam and the top of a post. Built from 18-gauge stainless steel, this connector delivers high and severe corrosion resistance, making it well-suited for demanding exterior and coastal environments where standard finishes fall short. It supports both new construction and retrofit applications where reliable structural support is needed, and like all AC series connectors, it is always installed in pairs to ensure balanced load transfer at the connection point.

Key Features

• Eliminates nailing into end grains - removes a common structural weak point, resulting in a cleaner and more dependable beam-to-post connection
• Stronger than angled nailing or screw fastening - provides a more reliable mechanical connection, giving builders and contractors greater confidence in the finished structure
• Designed for nominal 6x lumber - purpose-built sizing means the connector fits correctly the first time, reducing guesswork and installation errors
• Made from 18-gauge stainless steel - delivers the structural integrity of heavy-gauge steel while resisting corrosion in high-exposure and severe environments
• 8-1/2 in. length - provides sufficient bearing surface for a secure, stable connection between post and beam members
• Installs with 0.162 in. x 3-1/2 in. stainless-steel nails - fastener compatibility maintains corrosion resistance throughout the entire connection, not just at the connector itself

Why This Product

• Built for corrosive environments - the stainless-steel construction offers high and severe corrosion resistance, making this post cap a dependable choice for outdoor decks, pergolas, and coastal structures where lesser materials would degrade over time
• A mechanically stronger alternative - by eliminating end-grain nailing and outperforming angled nailing or screw fastening, this connector delivers a structurally superior beam-to-post connection that holds up under real load conditions
• Flexible enough for new builds and retrofits - the adjustable design accommodates both new construction framing and existing post installations, reducing the need to source different hardware for different job types
• Simpson engineering and domestic production - designed by Simpson, a trusted name in structural connectors, and manufactured in the United States, this post cap meets the expectations of professionals who specify hardware by brand for a reason

Specifications

• MPN: AC6SS
• Material: Stainless Steel
• Finish: Stainless Steel
• Gauge: 18
• Length: 8-1/2 in.
• Member Size: 6x
• Width: 5-1/2 in.
• Install With: 0.162 in. x 3-1/2 in. stainless-steel nails (sold separately)
• Country of Origin: United States

Frequently Asked Questions

What lumber size is the AC6SS post cap designed to work with?

The AC6SS is specifically designed for use with nominal 6x lumber, making it the correct choice when working with standard 6x posts and beams.

Why should the AC6SS be used instead of angled nailing or screw fastening?

The AC6SS post cap is engineered to be stronger than angled nailing or screw fastening and eliminates the structural weakness caused by nailing into end grains, resulting in a more reliable and secure beam-to-post connection.

Why does the AC series always need to be installed in pairs?

The AC series is designed to provide a positive connection between a beam and a post, and these connectors are always installed in pairs to ensure balanced load transfer and structural integrity at the connection point.

What type of fasteners are required to install the AC6SS post cap?

The AC6SS should be installed with 0.162 in. x 3-1/2 in. stainless-steel nails to maintain compatibility with the stainless-steel construction and ensure corrosion resistance throughout the connection.

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