Cat® Lock Nuts are special types of fastener designed to achieve a secure fixing. Some suppliers call them self-locking nuts. They are screwed onto a bolt or threaded rod just like standard nuts, but a lock nut will then resist loosening under torque or vibration forces. Cat® Fastener parts are designed for specific applications based on size, strength, clamp load, and past performance. This is 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. 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. Cat® Bolts, nuts, screws, and washers are designed to work together as a system for maximum clamping force. Coatings that meet special requirements for different applications (RoHS compliant).Application:Cat® Lock Nuts are used in bevel gear for mounting the yoke. Cat® Bolts and the matching hardened washers and nuts 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. Consult your owner's manual or contact your local Cat® Dealer for more information.