Factory Direct Sale 4140 Grind Pipe

Factory Direct Sale 4140 Grind Pipe. Wide Material Selection: Available in Carbon Steel, Stainless Steel 304/316, and grades like 4140, 1020, CK45. High Precision Surface: Surface roughness Ra 0.2-0.4um with ISO H8 internal tolerance for superior quality. Custom Dimensions: ID ranges from 30mm to 320mm, customizable to specific model requirements. Anti-Rust Protection: Inside and outside surfaces are oiled against rust, with plastic caps on both ends. Advanced Manufacturing: Produced using cold drawing, honing, and heat treatment for high durability. OEM/ODM Support: We offer OEM and ODM services to meet specific client design needs.