... for trucks,semi-trailers. 2,produce10 tooth slack adjust arm other spare parts. 3,BPW standard. ... We can supply various camshafts,slack adjuster,fifth wheel and Kingpin for trucks, semi ... of small, high intensity, over loading capability and not easy to distort, is made of high intensity ... loading capability, abrade resistent, heat resistant and not easy to distort. 8.HJ type bolt is ...