... : per customer's drawing 4.finish: zinc, nickel, chromed 1.sheet metal fasteners, fasteners, spacers2.Material: Brass,Stainless steel/aluminum/carbon ... steel, etc3.Finish: zinc, nickel, chrome plated, etc4.thread: M3, 3.5M3, M3,M4,M5 4-40, 6-32 ... : 86-136 92279015 AnnaTel:86-755- 61116055Fax:86-755-61116035 sheet metal fastener