H3861-117 3861-138 Bolt, Stuffing box will installed on the Mission 2500 Supreme Pump Stuffing Box. The Mission 2500 Supreme has a semi-open impeller design that contains wide-tipped vanes and a more tangential circumference of the suction allowing the pump to create a smoother flow pattern when handling abrasive fluids. The 2500 Supreme is available in hard iron, supreme hard iron, and aluminum bronze fluid ends. The pumps can be unitized with electric motors, diesel engines, and hydraulic motors (horizontal, vertical, or close-coupled configuration). Design Features: