Screw, Bolts, Nuts manufacturer / supplier in China, offering China Custom Torx Drive Coned Head Self Tapping Drilling Roofing Screw Factory for South African Market, Anti-Slip Flange Bolt with 16 Anti-Vibration Teeth - Green Steel, High-Strength for Heavy Machinery ISO/CE/RoHS Certified, DIN931- Grade 8.8/12.9/10.9/Stainless Steel/Carbon Steel Fastener Structural Bolt for Heavy-Duty Connections and so on.