double ended screw bolt: 1Surface:Black,HDG,Zinc,Dacron etc. 2We can ... :ISO9001:2008,SGS Type 70 double ended screw bolt black Details of the product:1.Standard : ASTM, BS ... DIN, AS, GB and so on.2.Surface treatment : Black, Hot-dip galvanization, Electro-galvanization, Dacroment and so on ... : PackagingFactory viewTesting equipmentsWorkshop Welcome your visit! Black Type 70 double ended screw bolt