The Simpson 2-2x4 Post Cap with Double-Shear Nailing, Stainless Steel is a dual-purpose connector from Simpson engineered for light post cap and post base connections between a double 2x beam and a 4x post. Built from 316L stainless steel, this hardware is designed to perform reliably in coastal, high-moisture, and corrosive environments where standard connectors would deteriorate over time. Its double-shear nailing pattern ensures dependable load transfer, and the connector is approved for use with both specified nails and Strong-Drive SD connector screws, giving installers flexibility in the field.

Key Features

• Dual-purpose post cap and base design - functions in both cap and base orientations, reducing the number of different connectors needed on a job site and simplifying procurement for light framing connections.
• 316L stainless steel construction - delivers maximum corrosion resistance in harsh, high-moisture, and marine environments where long-term structural integrity is critical.
• Double-shear nailing configuration - distributes load across multiple shear planes between the double 2x beam and the 4x post, providing a more secure and reliable connection than single-shear alternatives.
• Approved for nails or Strong-Drive SD connector screws - gives contractors and builders a choice of fastener types, accommodating different installation preferences and jobsite conditions without sacrificing approval status.
• 18-gauge 316L stainless steel body - the material grade and gauge work together to balance structural rigidity with corrosion performance, making this connector appropriate for demanding outdoor structural framing applications.
• Made in the United States - produced domestically, supporting consistent quality standards for structural connector hardware used in residential and light commercial framing.

Why This Product

• Built specifically for corrosive environments - the 316L stainless steel material is the specification of choice for coastal and marine construction, making this post cap a purpose-matched solution rather than a general-use connector pressed into a demanding application.
• One connector, two roles - the ability to serve as either a post cap or a post base in light connection applications means this single product covers more scenarios, reducing inventory complexity for builders and contractors working on larger framing projects.
• Fastener flexibility built into the design - approval for both standard nails and Strong-Drive SD connector screws means the connector works with different installation workflows without requiring a variance from the approved fastener list.
• Engineered pairing of beam and post sizes - designed precisely for a double 2x beam over a 4x post, this connector eliminates guesswork and fits the most common light framing configurations without modification or shimming.

Specifications

• Model Number: BCS2-2/4SS
• Nominal Post Size: Double 2x beam, 4x post
• Gauge: 18
• Width 1: 3 1/8 in.
• Width 2: 3 9/16 in.
• Length 1: 2 7/8 in.
• Length 2: 2 7/8 in.
• Height 1: 2 15/16 in.
• Height 2: 2 15/16 in.
• Coating/Material: Stainless Steel (316L)
• Fasteners Required - Beam Flange: (8) 0.162 x 3-1/2" Nails
• Fasteners Required - Post Flange: (6) 0.162 x 3-1/2" Nails
• Manufacturer: Simpson Strong-Tie
• Country of Origin: United States

Approved Applications

• Light post cap connections between a double 2x beam and a 4x post
• Light post base connections in corrosive or high-moisture environments
• Coastal and marine construction where maximum corrosion resistance is required
• Structural framing applications approved for use with 16d common nails or 16dx2 1/2" joist hanger nails
• Installations using Strong-Drive SD connector screws as an approved alternative fastener

Downloads and Resources

• View Spec Sheet

Frequently Asked Questions

What size post and beam is the BCS2-2/4SS designed to connect?

The BCS2-2/4SS is designed to connect a double 2x (two-ply 2x) beam on top to a 4x post below, providing a secure cap connection between these nominal lumber sizes.

Why is 316L stainless steel used for this post cap, and are special fasteners required?

316L stainless steel is specified for its maximum corrosion resistance in harsh, high-moisture, and coastal environments. Because stainless steel connectors can experience accelerated corrosion when paired with dissimilar metals, stainless steel fasteners are required when installing this connector.

Can the BCS2-2/4SS be used as a post base for fences or unbraced carports?

No. Post bases in the BC series do not provide adequate resistance to prevent members from rotating about the base and are therefore not recommended for non top-supported installations such as fences or unbraced carports.

Can Strong-Drive SD connector screws be used instead of nails to install the BCS2-2/4SS?

Yes. The BCS2-2/4SS is approved for installation with either the specified nails or Strong-Drive SD connector screws, providing flexibility based on jobsite requirements. Always use all specified fasteners and do not install bolts into pilot holes.

Note: Product dimensions and/or nail or screw holes may differ from picture.