Machine Part, Fastener, Bolt manufacturer / supplier in China, offering Customized Mold Accessories Such as Concave Molds, Rectangular Sleeves, and Rectangular Extrusion Molds., High Precision OEM/ODM Zinc Plated 3/8-16" Slip-on Lock Nut Made in China, High Precision Custom Zinc Plated 3/8-16" Slip-on Lock Nut and so on.