1/2"-13 × 4" Carriage Bolt – Grade 8, Plain Finish

Designed for long‑reach fastening in high‑stress applications, the 1/2"-13 × 4" Grade 8 carriage bolt provides exceptional strength and stability for demanding structural assemblies. The smooth, rounded head offers a clean finished appearance while distributing load evenly across the surface, and the square neck is engineered to seat firmly into wood or metal to prevent rotation during installation. Manufactured from heat‑treated alloy steel, this Grade 8 fastener delivers high tensile strength suitable for heavy‑duty, load‑bearing use. The plain, uncoated finish is ideal for controlled environments or applications where coatings are not required. Commonly used in machinery frames, equipment mounts, structural supports, and industrial fixtures requiring extended fastening length and dependable clamping force.