shackle pin, spring pin 1.surface:black,zp,phosphated 2.grade:8.8, ... 10.9,12.9 3.material:carbon steel140#,45# high strength king pin ... , isuzu king pin, leaf spring pin, hino king pins1.surface:black,zinc plated,phosphated2.grade:8 ... any questions, please feel free to contact me. high strength king pin