5/8"-11 × 4" Carriage Bolt – Grade 8, Plain Finish

Designed for long‑reach fastening in high‑load structural applications, the 5/8"-11 × 4" Grade 8 carriage bolt delivers exceptional strength and secure performance. The smooth, round head provides a clean exterior appearance, while the square neck is engineered to pull firmly into wood or metal to prevent turning during installation. Manufactured from heat‑treated alloy steel, this Grade 8 fastener offers high tensile strength suitable for heavy‑duty, load‑bearing assemblies. The plain, uncoated finish is ideal for controlled environments or applications where surface coatings are not required. Commonly used in machinery frames, equipment mounts, structural supports, and industrial fixtures requiring extended fastening depth and dependable clamping force.