This NorTrac pillow block features solid cast housing and top-quality advanced seals designed to prevent leakage and keep out dirt in your hydraulic application. Bolt Hole Shape Round, Dynamic Load Capacity lbs. 3,062, Block Size in. 1 3/8, Mount Type 4-bolt, Dimensions L x W x H in. 4.61 x 4.61 x 1.75, Bolt Hole Size in. 5/9, Static Load Capacity lbs. 4,424.