GPM 4140 carbon steel front C hub and rear stub axle carrier pins are manufactured to provide consistent fit and load distribution on the Traxxas JATO 4X4 VXL. The components are hardened and blackened to improve surface durability and resist wear in high load points. The external hex head reduces the risk of fastener rounding and gives secondary engagement under torque. For reliable joint integrity, use screw glue or equivalent thread locking compound when assembling.