The CNC steel parts are made of medium carbon steel, i.e. AISI 1045. Medium carbon steel is commonly used in CNC machining and is used in axles, gears, rails, fluid pipe couplings. It has excellent strength, and high heat resistance, so it is often used in demanding applications such as in automotive engine crankshafts. Crankshafts can be forged, or manufactured with CNC. The CNC parts are made by CNC machined. The thread is also CNC turned smoothly, it is M80X1.5.