Cat® Drain Plug allows the oil to drain out of the cylinder head. This offers a convenient and effective way to change the oil, since it drains out the used oil completely from the system. Cat® Plugs are held to the highest standards of quality and reliability. These caps and plugs are manufactured to exacting tolerances to ensure leak free connections. Each Cat® Plug is designed to meet or exceed industry standards for operating pressure, assembly torque capability, and corrosion protection to ensure a long life and proper machine functionality.Application:Cat® Drain Plugs are used in the cylinder head and other oil reservoir systems. Consult your owner's manual or contact your local Cat® Dealer for more information.