zhoushan Jwell Jinhailuo screw and barrel
DIN, ASTM, GOST, GB, JIS, ANSI, BS
Nitriding Electro Plating
High Quality Alloy Steel 38crmoala
Nitriding Treatment 72 Hours
Hb260-320
Hv900-1000
Spray Bimetallic-Alloy Coating
Plastic Extrusion, Chemical Fiber Extrusion
0.5-0.8mm
Less Than Grade 1
Ra0.4
0.015
After Nitriding More Then 950hv
0.025-0.085mm
Vacuum Quenching
jwell Jinhailuo
Wooden Box
according to different model