We are offering Extruder Single Screw for Hdpe Plastic Extrusion. The single screw barrel is widely used on the plastic extruder, rubber extrusion and food extruding machine. We will manufacture any specification from 15mm to 350mm, with the maximum length of 8000mm for the feed screw and its corresponding barrel. A full range of base material and surface coating are offered for your specific processing applications depending on wear resistance, corrosion resistance and material strength.Base Material: 38CrMoAlA, 40Cr, 42CrMo, SKD-61, Stainless Steel, etc.Surface Coating: Nitriding, Bimetallic, Hard Chrome Plated, Quenching, ect. Technical Data:Nitriding thickness: 0.50.8mmNitriding hardness: >900HVSurface roughness: Rao0.4/mSurface Straightness:0.015mm/m.