Core hole diameters Tapping American screw thread 60° Coarse thread in accordance with ASME B1 1 D D1 0 P threads min mm max mm per inch 2B/3B 2B

Core hole diameters Tapping American screw thread 60° Coarse thread in accordance with ASME B1.1 D D1 0 P threads min. mm max. mm per inch 2B/3B 2B 0 mm No. 1-64 UNC 1.425 1.582 1.55 No. 2-56 UNC 1.694 1.872 1.85 No. 3-48 UNC 1.941 2.146 2.10 No. 4-40 UNC 2.156 2.385 2.35 No. 5-40 UNC 2.487 2.697 2.65 No. 6-32 UNC 2.642 2.896 2.85 No. 8-32 UNC 3.302 3.531 3.50 No. 10-24 UNC 3.683 3.962 3.90 No. 12-24 UNC 4.343 4.597 4.50 1/4-20 UNC 4.976 5.268 5.10 5/16-18 UNC 6.411 6.734 6.60 3/8-16 UNC 7.805 8.164 8.00 7/16-14 UNC 9.149 9.550 9.40 1/2-13 UNC 10.584 11.013 10.80 9/16-12 UNC 11.996 12.456 12.20 5/8-11 UNC 13.376 13.868 13.50 3/4-10 UNC 16.299 16.833 16.50 7/8-9 UNC 19.169 19.748 19.50 1-8 UNC 21.963 22.598 22.25 1 1/8-7 UNC 24.648 25.348 25.00 1 1/4-7 UNC 27.823 28.524 28.00 1 1/2-6 UNC 33.518 34.295 34.00 1 3/4-5 UNC 38.951 39.814 39.50 2-4.5 UNC 44.689 45.598 45.00 UNEF Extra fine thread in accordance with ASME B1.1 D D1 0 P threads min. mm max. mm per inch 2B/3B 2B 0 mm 1/4-32 UNEF 5.491 5.679 5.55 5/16-32 UNEF 7.079 7.267 7.10 3/8-32 UNEF 8.666 8.854 8.80 7/16-28 UNEF 10.130 10.343 10.20 1/2-28 UNEF 11.718 11.931 11.80 9/16-24 UNEF 13.142 13.388 13.20 5/8-24 UNEF 14.729 14.976 14.80 Fine thread in accordance with ASME B1.1 D D1 0 P threads per inch min. mm 2B/3B max. mm 2B 0 mm No. 0-80 UNF 1.181 1.306 1.25 No. 1-72 UNF 1.473 1.613 1.55 No. 2-64 UNF 1.755 1.913 1.85 No. 3-56 UNF 2.024 2.197 2.15 No. 4-48 UNF 2.271 2.459 2.40 No. 5-44 UNF 2.550 2.741 2.70 No. 6-40 UNF 2.819 3.023 2.95 No. 8-36 UNF 3.404 3.607 3.50 No. 10-32 UNF 3.962 4.166 4.10 No. 12-28 UNF 4.496 4.724 4.60 1/4-28 UNF 5.367 5.580 5.50 5/16-24 UNF 6.792 7.038 6.90 3/8-24 UNF 8.379 8.626 8.50 7/16-20 UNF 9.738 10.030 9.90 1/2-20 UNF 11.326 11.618 11.50 9/16-18 UNF 12.761 13.084 12.90 5/8-18 UNF 14.348 14.671 14.50 3/4-16 UNF 17.330 17.689 17.50 7/8-14 UNF 20.262 20.663 20.40 1-12 UNF 23.109 23.569 23.25 1 1/8-12 UNF 26.284 26.744 26.50 1 1/4-12 UNF 29.459 29.919 29.50 1 3/8-12 UNF 32.634 33.094 33.00 1 1/2-12 UNF 35.809 36.269 36.10 8-thread series in accordance with ASME B1.1 D D1 0 mm 0 P threads per inch min. mm 2B/3B max. mm 2B 1 1/8-8 UN 25.138 25.962 25.40 1 1/4-8 UN 28.313 29.126 28.50 1 3/8-8 UN 31.488 32.123 32.00 1 1/2-8 UN 34.663 35.456 35.00 1 5/8-8 UN 37.838 38.623 38.10 1 3/4-8 UN 41.013 41.790 41.50 1 7/8-8 UN 44.188 44.957 44.45 2-8 UN 47.363 48.125 48.00 2 1/4-8 UN 53.713 54.462 54.00 D 468 WALTER PROTOTYP Technical information threading