1.material:The screw fasteners are made by stainless steel. 2.size ... buffering 1.product profile Phillips pan head combined screw fasteners are consisted of a screw ,a spring washer, ... Our conpany was built in 2004. We mainly provide fasteners,including screws,rivet, bolt, nut.ect. Nearly all ... kinds df styles are available. head styles: pan head, binding head, truss head,round head, hexagon head ,ect. ...