double ended screw bolt: 1Surface:Black,HDG,Zinc,Dacron etc. 2We can do by ... 's drawings. 8Certificate:ISO9001:2008,SGS Type 70 double ended screw bolt black Details of the product:1.Standard : ASTM, BS, UIC864 ... viewTesting equipmentsWorkshop Welcome your visit! Black Type 70 double ended screw bolt