API 5CT J55 K55 N80 L80 P110 Oil Casing Pipe Coupling
1. Size: 4-1/2''-20'' 2. End Type: BTC LTC STC 3. Steel Grade: J55, K55, N80-1, N80-Q, L80-9Cr/13Cr, C95, P110 ; 4. Specification: API Spec5CT and API Spec 5B
