Product Overview The SHACMAN F3000 / X3000 / M3000 Hex Flange Lock Nut (OE BY612600061719) is a Class 10, M10*1.5 fastener engineered for Weichai WP10, WP12, and WP13 heavy-duty truck engines. Supplied as part of the Weichai fasteners and small parts range, this lock nut delivers reliable clamping performance for demanding commercial vehicle applications. Key Specifications Part Number BY612600061719 Part Type Hex Flange Lock Nut Thread Size M10 * 1.5 Property Class Class 10