5/8"-11 × 3‑1/2" Carriage Bolt – Grade 8, Plain Finish

Engineered for applications that demand extended grip length and high structural strength, the 5/8"-11 × 3‑1/2" Grade 8 carriage bolt delivers dependable performance in heavy‑duty assemblies. The smooth, domed head provides a clean finished appearance while distributing clamping force evenly, and the square neck is designed to seat firmly into wood or metal to prevent rotation during tightening. Manufactured from heat‑treated alloy steel, this Grade 8 fastener offers exceptional tensile strength suitable for load‑bearing and high‑stress use. The plain, uncoated finish is ideal for controlled environments or installations where surface coatings are not required. Commonly used in machinery frames, equipment mounts, structural supports, and industrial fixtures requiring secure, long‑reach fastening.