The JCB 21477203 is a genuine OEM plug designed for a wide range of JCB agricultural and construction equipment. This essential component ensures proper sealing and functionality within hydraulic or fluid systems. With confirmed dimensions of 20mm length, 20mm width, and 20mm height, and a weight of 0.02 kg, it is a direct replacement part for maintaining optimal machine performance. It fits models such as 3CX, 4CX, 520, 530, JS series excavators, and TM series telehandlers.