Z-SINPRO is a Taiwan fastener manufacturer of stainless wedge anchors, stainless stamping parts, stainless washers, and stainless special bolts. Business Results: Argentina: Stainless special bolts (based on prints-oval head), Japan: Stainless wedge anchors, Poland: Stainless stamping parts, stainless wedge anchor expansion clip, Philippines: stainless flange nuts, stainless socket button head cap screws, stainless washers, stainless nyloc nuts, UK: Stainless Custom Screw(patented), USA: Stainless flat washers(custom for valves)