Machine Part, Fastener, Bolt manufacturer / supplier in China, offering High Precision Mold Positioning Column, B1-16 Positioning Pin, Guide Column, M6-M20 Hot-Sale Easy Installation for Thread Rods Slide on Quick Action Nut, 3/8-16" 5/8-11" Unc Threaded Insert Zinc Plated Square Nuts Slip-on Lock Nuts and so on.