Diameter of screw：Ø20-Ø220

Power of locknut：100KN～35000KN

Capacity of injection：30～30000g

Hardness After Hardening & Tempering:：HB240°～280°

Nitrided Hardness：HV850°～1000°

Nitrided Depth：0.45～0.7mm

Nitrided Brittleness：≤Grade 2

Surface  Roughness：Ra0.4

Screw straightness：0.015mm

Surface Chromate-plating's Hardness After Nitrided：HV≥900HV

Chromate-plating Depth：0.05～0.10mm

Alloy Depth：0.8～2.0mm

Bimetallic-alloy Hardness：HRC56°～65°（adopt nickel base alloy）