The JCB 81310165 is a genuine OEM O-RING designed for critical hydraulic sealing applications across a wide range of JCB agricultural, construction, and industrial machinery. Manufactured to precise specifications, this O-ring ensures a reliable, leak-free seal with an inner diameter of 31.47 mm and a cross-section of 3.53 mm. It is a vital component for maintaining system integrity and preventing fluid loss in compatible JCB models such as 3CX, 4CX, JS series excavators, Loadall telehandlers, and Fastrac tractors.