This Hexagonal Bolt M8x1.25×42 is a precision-engineered fastener designed for critical automotive assembly and repair applications. The specification "M8x1.25×42" defines its key dimensions: an M8 metric diameter, a fine 1.25mm thread pitch, and a 42mm nominal length from under the head to the thread end. The fine thread pitch offers superior vibration resistance and allows for precise clamping force adjustment, making it ideal for components subjected to dynamic stresses, such as engine accessories, bracket mounting, or suspension elements.

Manufactured from high-grade steel and typically featuring a zinc-plated or other corrosion-resistant finish, this bolt ensures long-term durability and protection against harsh environmental conditions found in automotive use. The hexagonal head provides a reliable grip for standard wrenches and sockets, facilitating secure installation and removal even in confined spaces. It is crucial to verify the specific grade classification (e.g., 8.8, 10.9) to match the mechanical strength requirements of your application, ensuring it can handle the intended tensile and shear loads.

Always pair this bolt with a correctly graded nut and, where specified, a washer to distribute the load and prevent damage to the fastened parts. Prior to installation, confirm the required thread engagement depth and torque specifications from your vehicle’s manufacturer. This ensures a secure, reliable, and safe connection that maintains the integrity of your automotive system.