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Plug screw is also called shoulder screw, stop screw, stop bolt, brake bolt, etc; The plug screw is used together with the bolt pull rod, which is mainly used to control the mold opening stroke between the fixed mold base plate, the runner push plate and the fixed mold template in the three plate mold. Because it can be set on the parting surface of the die, the die design can be miniaturized. These products have high hardness, good toughness, excellent wear resistance and heat resistance. They are suitable for precision molds, which can significantly improve their service life. In particular, the hot shape of precision molds has been effectively controlled, and they are suitable for molds in high-temperature working environment.

Materials include stainless steel, high carbon steel, alloy steel, grades 8.8, 10.9 and 12.9, size m4-m36, surface, blue and white zinc, black zinc, nickel, copper, Dacromet, etc.