The round head carriage bolt, often referred to as a coach bolt, features a square neck that locks the bolt securely when mated with a square hole, providing an effective self-locking mechanism during tightening. This product is galvanized in accordance with ASTM A-153 standards for enhanced durability, ensuring it withstands the demands of various applications. Crafted from steel, it offers an impressive rated tensile strength of 7,800 lbs and comes complete with a square nut for immediate use. Manufactured to meet ANSI C135.1 and CAO 7096 regulations, this versatile bolt is suitable for aerial hardware and poles, making it a reliable choice for both professionals and DIY projects alike.