Cat® Lynch pin, is a fastener used to prevent a Grapple from opening beyond its limit while working. 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. 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® Parts are manufactured to precise specifications and are built for durability, reliability, productivity, less environmental impact and reuse.Application:Consult your owner's manual or contact your local Cat® Dealer for more information.