1"‑8 × 4‑1/2" Grade 8 Dome Head Plow Bolt No. 3 – 150,000 PSI, Plain Finish

The 1"‑8 × 4‑1/2" Grade 8 dome head plow bolt (No. 3) is engineered for extreme‑duty, high‑impact applications where maximum strength, durability, and a flush, low‑profile mounting surface are required. Manufactured to Grade 8 specifications with a minimum tensile strength of 150,000 PSI, this fastener features a smooth, rounded dome head that minimizes wear and surface interference, along with a square neck that seats securely in the mating hole to prevent rotation during installation. Supplied in a plain (uncoated) finish, this plow bolt is commonly used in plow blades, grader edges, snow‑removal equipment, and heavy earth‑moving machinery where superior shear resistance, impact toughness, and long service life are critical.