Cat® Hexagon Head Bolt are designed for fixing differential housings based on size, strength, clamp load, and past performance. They are selected to last until rebuild or the life of the machine. While it may seem as though non-Cat® hardware and fasteners are suitable for your machine, no other company knows your equipment like we do. Cat® Fasteners are manufactured to precise specifications and are built for durability, reliability & productivity. Strength & Quality Fasteners meet or exceed ISO, ASTM, ASME & SAE requirements.Application:Cat® Bolts and the matching hardened washers and nuts form a performance based system which produces consistently high clamp loads. It is used in the differential housing of Cat® machines. You can trust Cat® Fasteners to help you build it, maintain it, or fix it - for most machine and workshop applications throughout the world. Consult your owner's manual or contact your local Cat® Dealer for more information