Design Details
Screw
I TYPE:nitirding ones
II TYPE:bimetallic ones
III TYPE:chrome plating ones
Barrel
I TYPE:nitriding ones
II TYPE:bimetallic ones
Accessories
Stop ring+washers to adjust the space between screw and barrel

Technical Specification
Material:High quality 38CrMoAlA
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