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18 5/8 OD seamless carbon steel , threads acc. To API 5 B STD . short thread coupling (STC) weight 61 lb/ft steel grade H-40/J-55 11.05 mm length acc. To API range 213 3/8 OD seamless carbon steel , threads acc. To API 5 B STD . short thread coupling (STC) weight 87.5 lb/ft steel grade /J-55 10.9 mm length acc. To API range 29 5/8 OD seamless carbon steel , threads acc. To API 5 B STD . short thread coupling (STC) weight 40 lb/ft steel grade J-55 10.03 mm length acc. To API range 2 seamless carbon steel, seamless carbon pipes, seamless carbom steel pipe drilling fluids