... deformation testing 4.Small volume,carring a 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 small volume ,carring a big ... ).3.According to the type are divided into: Bow shackle, Bow shackle with nut, D type shackle, D type shackle with nut.4. Material quality ...