THREAD ROLLING SHUTTER SERIES BRIEF INTRODUCTION
    thread rolling shutter series has the advantages of which manufactures in occident and japan.Dimensions of each part are arranged scientifically and rationally with fine fabrication.It is tested strictly and adopted high strength anti-friction alloy material with vacuum heat treatment.which can ensure the threads in each part durable and high speed.
    Hua Chao Company not only provides custonmers various thread rolling shutter series with different specifications of self-tapping screw.fiberboard screw ,wall screw,wood screw,It also provides with thrcad rolling shutter series of machine screw with shinkage tail and three-edged screw.