The JCB 45010403 is an authentic OEM differential side nut, crucial for securing components within the differential assembly of a wide range of JCB machinery. This robust fastening part ensures reliable performance and durability in demanding agricultural and construction applications, fitting models such as the 3CX and 4CX backhoe loaders, and Loadall telehandlers including the 520, 525, 526, 527, 530, 531, 532, 533, 535, 536, 537, 540, 541, and 550 series.