3/8"-16 × 6" Carriage Bolt – Grade 8, Plain Finish

Manufactured for extra‑long fastening requirements in high‑strength applications, the 3/8"-16 × 6" Grade 8 carriage bolt is built to handle demanding structural and industrial loads. The smooth, round head provides a clean exterior surface, while the square neck is designed to lock into wood or metal to prevent rotation during tightening. Made from heat‑treated alloy steel, this Grade 8 fastener offers excellent tensile strength and durability for heavy‑duty, load‑bearing assemblies. The plain, uncoated finish is well suited for controlled environments or installations where surface coatings are not necessary. Common applications include machinery frames, heavy equipment mounts, structural supports, and industrial fixtures requiring extended reach and reliable fastening strength.