CNC Machine Part, Screws, Turning Parts manufacturer / supplier in China, offering Custom Hexalobular Pin Torx Button Head Tamper Proof Anti Theft Security Screw, Custom DIN 7991 Alloy Steel Black 10.9 12.9 Grade Flat Countersunk Screw, Custom Six Lobe Stainless Steel Security Tamper Proof Pin in Torx Screw and so on.