API tubing and casing seamless pup joint Product Name: oil tubing pup joint (pipe fitting pup joint, pipe fitting) Standard Reference: API spec 5CT Size: From 4-1/2"-13-3/8" Surface treatment: Coating Protection of Thread: Thread protector Grade: J55, K55, N80-1, N80-Q, L80, C90, P110 Thread Type: STC, LC, BTC. Dimensions and their tolerances of tubing round-thread as per API spec 5B