API Spec 7-1 Gas Drilling Lifting Sub 3 1/2"- Nc31 AISI 4145h
Hebei Shitan Machinery Manufacturing Co., Ltd.Base Info
- Model NO.：O. D 3 1,2"- NC31
- Manufacturing Process：Forging and Integral Heat Treatment
- Surface Treatment：Spray-Paint
- Operation Pressure：Atmospheric Pressure
- Material：Structural Alloy Steel 4145h
- Trademark：Shitan
- Specification：O. D 3 1,2"- NC31
- Origin：China
- HS Code：8431431000
Description