Cal-Royal - BB31 - Five Knuckle - Square Corner - Two Ball Bearing - 4-1/2" x 4-1/2" - Oiled Antique Bronze

Cal-Royal's standard-weight door receives frequency service (standard-weight hinges) and high-frequency service (heavy-weight hinges). These hinges are designed to have both leaves mortised into the door and door jamb. The hinge sits flush with the service of the door and frame. The BB31 is made with four ball-bearing assemblies and is recommended for MEDIUM use with a door closer. The package is packed with fasteners for hollow metal and wood doors. 

Specifications:

Downloads:

• Catalog
• Cut Sheet