National 343-009BK axle hub cap, a heavy duty cast aluminum truck hub cap. The cast aluminum body is built for truck hub service, and the part is listed in our National Seals category with the other National hub and seal components. A genuine National part from Pro Gear and Transmission.FeaturesNational 343-009BK axle hub capHeavy duty truck hub capCast aluminum constructionGenuine National partTech SpecsType: Axle hub capMaterial: Cast aluminumDuty: Heavy duty truck