The JCB 40302640 is an original equipment manufacturer (OEM) M10 plain washer, essential for secure fastening in a wide range of JCB agricultural and construction equipment. This genuine JCB washer measures 10.5 mm in inner diameter, 20 mm in outer diameter, and 2 mm in thickness, ensuring proper load distribution and preventing loosening of bolted joints. It is a critical component for maintaining the integrity and performance of machinery, including models such as the 3CX, 4CX, various Loadalls, and excavators.