API 5CT Seamless Steel Tubing And Casing Coupling N80 Casing Steel Pipe
| Item Type | Casing coupling | Tubing coupling |
| Specification | 4-1/2", 5", 5-1/2", 6-5/8", 7", 7-5/8", 8-5/8", 9-5/8", 10-3/4", 11-3/4", 13-3/8", 16", 18-5/8", 20" | 1.9", 2-3/8", 2-7/8", 3-1/2", 4", 4-1/2" |
| Steel grade | J55, K55, L80, N80, P110 | J55, L80, N80 |
| Thread type | STC, LTC, BTC | EUE, NUE |
