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

The 1"‑8 × 4" Grade 8 dome head plow bolt (No. 3) is designed 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 bolt features a smooth, rounded dome head that reduces wear and surface interference, along with a square neck that seats firmly 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.