d 3 3.5 4 4.5 5 6 d1 1.8 2.1 2.4 2.70 3.0 3.60 D 6 7 8 9 10 12 p 1.35 1.6 1.8 2 2.2 2.6 Cross Recess No. 1 2 3 Length L Thread Length b 10 6.5 13 9.5 9.0 8.5 15 11.5 11.0 10.5 10.0 17 13.5 13.0 12.5 12.0 11.5 20 16.5 16.0 15.5 15.0 14.5 25 21.5 21.0 20.5 20.0 19.5 30 26.5 26.0 25.5 25.0 24.5 35 31.5 31.0 30.5 30.0 29.5 40 31.5 36.0 35.5 35.0 34.5 33.0 45 36.0 40.5 40.0 39.5 38.0 50 36.0 45.5 45.0 44.5 43.0 55 48.0 50.0 49.5 48.0 60 48.0 55.0 53.0 53.0 70 55.0 53.0 58.0 80 53.0 70.0 L Weight of 1000 units in kg,approximately 10 0.401 13 0.484 0.656 0.897 15 0.540 0.730 0.991 1.310 17 0.595 0.803 1.085 1.430 1.840 20 0.679 0.913 1.226 1.612 2.064 25 0.818 1.097 1.461 1.914 2.437 30 0.957 1.281 1.696 2.216 2.810 35 1.096 1.465 1.931 2.518 3.183 40 1.371 1.649 2.166 2.820 3.557 5.213 45 2.024 2.401 3.122 3.930 5.751 50 2.399 2.636 3.424 4.303 6.289 55 2.999 3.726 4.676 6.826 60 3.489 4.028 5.167 7.364 70 5.268 6.698 9.005 80 8.230 9.854