... surface plating according to customer demands, for example, Ag-plated, Au-plated, Al-plated, Cr-plated, Ni-plated, Sn-plated, Zn ... .430,Y12Pb,Iron,Brass,Copper etcScrew threadM2.5~M40FinishAg-plated, Au-plated, Al-plated, Cr-plated, Ni-plated,Sn-plated, Zn ...