d 1 d 1 l 2 l 1 l 3 d 2 Øh 8 decimal Øh 6 A553 mm Inch mm mm mm mm 17.50 0.6890 130 190 48 18 A55317.5 17.75 0.6988 130 190 48 18 A55317.75 18.00 0.7087 130 190 48 18 A55318.0 19.00 0.7480 135 200 50 20 A55319.0 19.25 0.7579 140 200 50 20 A55319.25 20.00 0.7874 140 200 50 20 A55320.0 81