Best 711128450 Extra Heavy Full Surface Hinge 4.5in Steel

Product Description

The BEST 711128450 is an extra heavy full surface hinge designed for commercial and heavy-duty door applications. It mounts entirely on the surface of both the door and the frame, eliminating the need for mortising. Constructed from steel with a plain finish, this hinge features a non-removable pin for added security. The leaf height measures 4.5 inches on both the door and frame sides, with a nominal size of 4.5 inches by 4.5 inches. The leaf thickness of 0.15 inches and pin diameter of 0.292 inches reflect its heavy-duty construction. Installation is handled by commercial door hardware technicians or carpenters working on institutional, industrial, or high-traffic entryways.

This hinge is suited for full surface mount applications where mortised installation is not practical or permitted. Typical use cases include steel doors on metal frames, utility and mechanical room doors, and storage facility entryways where durability and security are priorities. The extra heavy classification makes it appropriate for doors with higher frequency use or greater weight than standard residential applications. The plain finish accepts field-applied paint or coatings as needed for the installation environment.

Key Features

• Full surface mount — no mortising required on door or frame
• Non-removable pin for improved door security
• Steel construction rated for extra heavy duty use
• Nominal size 4.5 inches by 4.5 inches for consistent fitment
• Leaf thickness of 0.15 inches provides structural rigidity
• Plain finish suitable for field painting or coating

Compatibility

Designed as an OEM-style full surface replacement hinge for extra heavy duty commercial and industrial door applications requiring a 4.5 inch full surface mount configuration.

Installation Notes

Installation is typically performed by a commercial door hardware technician or licensed carpenter. Ensure the door is fully supported and the opening is plumb and square before fastening. Use fasteners appropriate for the door and frame material — do not overtighten into hollow metal frames without backing. Verify local building and fire codes for hinge quantity and placement requirements on rated door assemblies.