The JCB 81617058 is a genuine OEM hydraulic coupling designed for connecting hydraulic lines with differing thread types. This coupling features a 3/4 UNF (Unified National Fine) thread on one side and a 1/4 BSP (British Standard Pipe) thread on the other, ensuring a secure and leak-free connection in hydraulic systems. Manufactured to JCB's stringent quality standards, this part ensures optimal performance and durability for a wide range of JCB agricultural and construction machinery.