... for processing of 50-60% fiberglass, Bakelite, dynamoelectric injection machine, magnetic particle ,ceramic powder, aluminum and magnesium powder, ... longer than the nitrided screw.Single screw of injection machine types:screw and barrelDianeter of screw: Φ15—Φ ... ,PA66,LCP,PC,EVA,PS,U-PVC,PVC,PU,or Plastics. Depth of nitration case0.5 mm ... mm~0.08mm Super - hard plastic injection moulding machine screw