... big weight US Type Screw Pin D Shackle G2101.According to the production standar are generally classified into US type, JIS ,GB. US standar of ... divided into: Bow shackle, Bow shackle with nut, D type shackle, D type shackle with nut.4. Material quality : Carbon steel, alloy steel, stainless steel, high strength steel .5.Surface treament ...