Screwtech designs, manufactures, supplies a complete selection of inch and metric linear mechanical parts systems to the Linear Motion Power Transmission Industries. Our products include: Metric lead screws with bronze or plastic nuts, C3-C7 accuracy grade, single-start multi-start, dia. from 4mm 100mm; Ball internal ...

Zhongtao is handing a wide range of products include ceramic products, plastic products, daily necessities, hardware products, needle textile, auto parts, computers and parts, general machinery, building and decorating materials, food, consulting servicers of the above areas.