Screw, Fastener, Bolt manufacturer / supplier in China, offering Precision M2 M3 M4 M5 M6 M8 Stainless Steel Brass Aluminum Round Cylinder Tube Spacer, M2 M2.5 M3 M3.5 M4 M5 M6 M8 Brass Knurled Insert Nut Ultrasonic Heat Staking Heat Set Threaded Brass Insert for Plastic, M1.6 M2 M3 M4 Steel Spacer Withinternal Thread 9774010360r/9774010982r and so on.