... ,BPW standard. We can supply various camshafts,slack adjuster,fifth wheel and Kingpin for trucks, semi-trailers.1,Supply various camshafts ... speed, good intensity, abrade resistant and heat resistant.7.HJ wheel hub and brake drum use the international standard material of ball ... , heat resistant and not easy to distort.8.HJ type bolt is made of alloy material, which has the capability of ...