This is a full mortise hinge with concealed anti-friction bearings. It mounts in a mortised door and frame on commercial openings and is built for heavy weight use. The pin is non-removable. The body is steel. Part AB750N 4-1/2X4-1/2 USP is the Heavy Weight, 4-1/2 x 4-1/2 in, Steel, 3 Knuckle, Non-Removable Pin version in Primed for Painting.

• Heavy Weight
• 4-1/2 x 4-1/2 in
• Steel
• 3 Knuckle
• Non-Removable Pin
• Finish USP Primed for Painting
• Fire rated: 3 Hours {A}
• Part number AB750N 4-1/2X4-1/2 USP