Drive recess:phil,square Head type:bugle Diameter:#6-#10,M3.5-M4.8 Shape:Countersunk Head (Flat Head) Groove:Philip Material:Carbon steel & stainless steel Standard:DIN,BSW,ANSI,ISO & non-standard products Surface:Plain, Y.Z.P., Black, Z.P. Kingpluse Industry is a fasteners and hardware manufacturer, as well as an exporter with a wide range of industrial products located in Shanghai.We have advanced production facility, abundant technical forces and complete quality assurance system.We can produce various kinds of nuts.