The 627 series high load butt hinge is a surface mounted, bronze bearing, hinge manufactured by welding and machining. These hinges are designed for outdoor and harsh environments. The pin is stainless steel to prevent corrosion. Bearings consist of two bronze thrust washers and two bronze sleeves for reduced friction. Oil fittings come standard for preventative maintenance. These hinges can be mounted by welding or predrilled mounting holes can be added.