C90
K55, N801, N80Q, C90, T95 Tubing Coupling
⑴ The tubing coupling is a joint for connection of two items of tubing ★ Steel grade: J55, K55, N801,...
C90, T95, P110, Q125 Casing Coupling, LC, STC, BC
⑴ API Round Thread Casing Coupling ★ The dimension classification for the coupling is the same as the...