Cat® Fastener parts are designed for specific applications based on size, strength, clamp load, and past performance. These screws can create their own threads. The plastic thread forming have threads shaped to not crack a plastic boss. There are several types of metal thread forming, from screws intended for sheet metal to ones capably of making threads in structural steel. This information other manufacturers do not have. 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.Application:Cat® Screws and the matching hardened washers form a performance based system which produces consistently high clamp loads. You can trust Cat® Fasteners to help you build it, maintain it, or fix it - for most machine and workshop applications throughout the world.