5/16"-18 × 1" Carriage Bolt – Grade 8, Plain Finish

Built for high‑strength fastening in industrial and structural applications, the 5/16"-18 × 1" Grade 8 carriage bolt provides reliable performance where durability is critical. The smooth, rounded head delivers a clean finished appearance, while the square neck is designed to bite into wood or metal to prevent rotation during installation. Manufactured from heat‑treated alloy steel, this Grade 8 fastener offers superior tensile strength compared to standard carriage bolts. The plain, uncoated finish is ideal for controlled environments or applications where coatings are not required. Commonly used in machinery, equipment frames, fixtures, and structural assemblies requiring secure, high‑load fastening.