Square Post Caps

Square post caps for 1-3/4” and 2” square posts are available in 5-1/2” and 12” slots for flat and extruded sign blades. Fasteners come pre-installed, ready to mount.

More Information

Bracket Size Selection Guide

Bracket Slot Length Recommended Sign Size Blade Type Compatibility
5-1/2″ 18″ to 30″ Flat & Extruded
12″ 30″ to 42″ Flat & Extruded

Technical Specifications & Compatibility

Flat vs. Extruded Blade Compatibility

Flat blades: Standard thickness signs suitable for most applications. Lighter weight and cost-effective for general street signage.
Extruded Blades: Thicker, heavy-duty signs with enhanced durability. Recommended for high-wind areas and premium installations.

Installation Requirements

Hardware needed:

  • Standard set screws (included with pre-drilled and tapped brackets)
  • Standard T-Handle tool for installation
  • Optional: Vandal-proof set screws with specialized T-Handle tool for enhanced security
All mounting hardware and tools are available in our Sign Mounting Fasteners section.

Real World Applications

Extruded Street Name Sign mounted on Square Post Cap, perpendicular to Stop sign

Extruded Street Name Sign mounted on Square Post Cap, parallel to Stop Sign

Square post cap with hole used in conjunction with separator to hold two flat signs