Non-Standard Metal Parts manufacturer / supplier in China, offering Metric-to-Metric Male-Female Hex Thread Adapters Carriage Bolts M3 M4 Thread Plain Finish Hex Board Spacing Screw, Us Standard Stainless Steel 304 316 Socket Head Cap Screws Grade 12.9 Alloy Steel Hex Socket Head Cap Screw, DIN912 Stainless Steel 304 316 Hexagon Socket Head Cap Screws M3 M4 M5 M6 DIN 912 Countersunk Head Screws and so on.