Two types of coupling are available which meet API Specifications: Regular API Class T coupling and spray metal coupling for anti corrosion. Dimensions and tolerances conform to API Specification 11B. Quality control consists of process, random, and batch inspections

1) Material: Seamless alloy steel

2) Standard: API Spec 11B

3) Grade: SM

4) Coupling diameter: 5/8", 3/4", 7/8", 1", 1 1/8"

5) Coupling Hardness: 58(-) HRA

6) Metal coating hardness: 819(+) Hv0.2