Cap screw, Screw and barrel, screw caps, seat, rings for injection moulding machine Clamping force:25-3200tons Cap screw, Single screw and barrel for injection ... HRc56°-65°) Roughness of the surface:Ra 0.4μm Screw straightness: 0.015mm/m Chrome plating thickness: 0.01- ... -proof, heatproof, high-pressure proof and high-speed proofSuitable plastic material: PP,PE,ABS,AS,PS etc. Material: 38CrMoALA