Caterpillar-style premium aftermarket hexagonal bolt. Part reference 7X0481. Size/application: Hexagonal Bolt 1/2 -13 x 8 Inch. Corresponding nut reference: 2J3507. General heavy-equipment fastening hardware for the matching assembly. Brand compatibility: Caterpillar and premium aftermarket systems built to the matching Caterpillar specification. Standardized dimensions may also fit other major brands when diameter, thread, length and seat are identical. Confirm strength grade, thread pitch and installed length.