STEEL PER AMS5659; 1.000 IN. LG 0.673 IN. OD 0.313 IN. DIA BORE; COUNTERBORE FIRST END 0.377 IN. DIA 0.119 IN. DEEP; CHAMFER LEFT AND RIGHT OUTSIDE CORNERS 0.060 IN. X 30.0 DEG; CHAMFER LEFT INSIDE CORNER 0.120 IN. X 30.0 DEG; TWO EXTERNAL GROOVES 0.156 IN. W X 0.176 IN. DEEP 0.474 IN. FROM FIRST END TO BACK OF FIRST GROOVE 0.813 IN. FOR SECOND GROOVE