Description:Cat brake pistons are a critical component in the brake system for Cat machine drive trains, allowing the machines to slow, stop, or hold a stationary position.Attributes:• Cast iron brake piston• Outside Diameter: 500.13 mm (19.690 in)• Inside Diameter: 339.8 mm (13.377 in)• Width: 58.29 mm (2.294 in)• Thread Size: 3/8-16 (3 Places)Application:Brake pistons are used in Cat drive train braking systems. Consult your owner's manual or contact your local Cat Dealer for more information.