This square ground plate is designed as the base interface for fiberglass flagpoles built for a 5.5" butt diameter. The plate provides a stable mounting surface and ensures proper alignment between the pole and the below-grade foundation hardware.

The plate includes a four-bolt pattern sized for standard fiberglass flagpole anchor layouts, allowing the pole to be securely fastened while maintaining correct spacing and vertical load distribution. The integrated tabs along the lower edge support pole indexing and help lock the pole into the correct orientation during installation.

This component is typically used when replacing damaged mounting hardware, converting an older foundation setup, or installing a new fiberglass pole that requires a square plate interface. Compatible only with fiberglass flagpoles engineered for a 5.5" ground-engagement system.

To understand more about flagpole foundations and installation, visit Flagpole (hardware). For flagpole ground plates and installation accessories, check out Flagpoles Etc.