Screw can be matched with different heads, and barrel can be matched with different nozzles.
Material：High quality 38CrMoAIA
Process: Advanced nitriding & bimetallic
Process Hardness After Hardening & Tempering: HB280-320
Nitrided Hardness: HV900-1000
Nitrided Case Depth: 0.45-0.8mm
Nitrided Brittleness: Less than Grade 2
Surface Roughness: Ra 0.4
Screw Straightness: 0.015mm
Alloy Hardness: HRC 50-65
Alloy Depth: 0.8-2.0mm
thickenss After Chrome: 0.05-0.10mm
chrome Hardness: Not less than 950HV