The material is special stainless steel, treated with quenching treatment, hard HR55-58. It is suitable for all transparent and corrosive supplies, and the lifespan is long.
Our company provide all kinds of screw, such as PVC, PC, nylon&glass fiber, bakelite, ceramic powder, halogen-free, etc.
Screw diameter: type Ф18-Ф250
Material: 38crMoAIA, hardening and tempering, nitrogen treatment
Surface hardness: HV≥900 nitriding layer thickness: 0.5-0.8mm