... /105, 55/110, 55/120,58/124, 60/125, 65/120, 65/132, 68/143, 70/135,70/140, 75/150, 80 ... Straightness: 0.015mm5) Bimetallic Hardness: HRC50-626) Bimetallic Depth: 1.5-2.0mmBARREL1) Nitride Depth: 0.55-0.7mm2) Nitride Hardness ... : Ra≤1.6um4) Bimetallic Hardness: HRC50-655) Bimetallic Depth: 1.5-2.0mmScrew type:Gradual type, mutant type, wave type, barrier ...