"7TUBING,STEEL MECHANICAL,SEAMLESS,AISI 1018,CAD. PLATED PER. Q-P-416,TYPE 2,CLASS1,CASEHARDEN CUTTING EDGE TO ROCKWELL 15N 80-83 0.015- 0.030 IN. DEEP,6.500 IN. OD,5.958 IN. MIN,5.978 IN. MAX. ID. AT CUTTINGEDGE,70.0 DEG ANGLE TAPER AT CUTTING EDGE"