GBP 57 Table of screw slot sizes / screwdriver blades DIN 5264 / ISO 2380-2 1. Threaded screws Manual screwdrivers Size M 1.2 M 1.4 M 1.6 M 1.8 M2 M 2.5 M3 M 3.5 M4 M5 M6 M8 M 10 DIN EN ISO 1207 a) 0.3 0.3 0.4 0.4 0.5 0.6 0.8 1 1.2 1.2 1.6 2 2.5 b a b) 2.3 2.6 3 3.4 3.8 4.5 5.5 6 7 8.5 10 13 16 3×0.5 3.5×0.6 4×0.8 6.5×1.2 Screwdriver tip mm 2×0.3 2.5×0.4 5.5×1 8×1.2 10×1.6 12×2 14×2.5 (3.5×0.5) (4×0.6) (5.5×0.8) (8×1.2) Size M 1.2 M 1.4 M 1.6 M 1.8 M2 M 2.5 M3 M 3.5 M4 M5 M6 M8 M 10 DIN EN ISO 1580 a) - - - - - - 0.8 1 1.2 1.2 1.6 2 2.5 b a b) - - - - - - 6 7 8 10 12 16 20 4×0.8 5.5×1 Screwdriver tip mm - - - - - - 8×1.2 10×1.6 12×2 14×2.5 (5.5×0.8) (6.5×1) Size M 1.2 M 1.4 M 1.6 M 1.8 M2 M 2.5 M3 M 3.5 M4 M5 M6 M8 M 10 DIN EN ISO 2009 a) 0.3 0.3 0.4 0.4 0.5 0.6 0.8 0.8 1 1.2 1.6 2 2.5 b a b a DIN EN ISO 2010 b) 2.3 2.6 3 3.4 3.8 4.7 5.6 6.5 7.5 9.2 11 14.5 18 3×0.5 3.5×0.6 4×0.8 Screwdriver tip mm 2×0.3 2.5×0.4 5.5×1 8×1.2 10×1.6 12×2 14×2.5 (3.5×0.5) (4×0.6) (5.5×0.8) 2. Sheet metal screws Size ⌀ mm 2.2 2.9 3.5 3.9 4.2 4.8 5.5 6.3 DIN EN ISO 1481 a) 0.6 0.8 1 1 1.2 1.2 1.6 1.6 b a b) 4.2 5.6 6.9 7.5 8.2 9.5 10.8 12.5 3.5×0.6 4×0.8 5.5×1 Screwdriver tip mm 8×1.2 10×1.6 (4×0.6) (5.5×0.8) (6.5×1) Size ⌀ mm 2.2 2.9 3.5 3.9 4.2 4.8 5.5 6.3 DIN EN ISO 1482 a) 0.5 0.8 1 1 1.2 1.2 1.6 1.6 b a b) 4.3 5.5 7.3 7.5 8.4 9.5 10.8 12.4 3.5×0.5 4×0.8 5.5×1 6.5×1.2 Screwdriver tip mm 10×1.6 (3.5×0.5) (5.5×0.8) (6.5×1) (8×1.2) Size ⌀ mm 2.2 2.9 3.5 3.9 4.2 4.8 5.5 6.3 DIN EN ISO 1483 a) 0.5 0.8 1 1 1.2 1.2 1.6 1.6 b a b) 4.3 5.5 7.3 7.5 8.2 9.5 10.8 12.4 3.5×0.5 4×0.8 5.5×1 6.5×1.2 Screwdriver tip mm 10×1.6 (3.5×0.5) (5.5×0.8) (6.5×1) (8×1.2) 3. Grub screws Size M 2.5 M3 M 3.5 M4 M5 M6 M8 M 10 M 12 a) 0.4 0.4 0.4 0.6 0.8 1 1.2 1.6 2 ISO 7435, b a DIN EN ISO 2342 b) 2.5 3 3.5 4 5 6 8 10 12 Screwdriver tip mm 2×0.4 2.5×0.4 3×0.6 4×0.8 5×1.0 6.5×1.2 8×1.6 Blade widths shown in brackets ( ) meet the VSM standard. The 45° chamfer on the screwdriver tip allows wider blades to ° 45 be used on countersunk screws and raised head screws.  Table of cross-head screw slots / screwdriver blades to DIN ISO 8764 1. Threaded screws Size M 1.6 M 1.8 M2 M 2.5 M3 M 3.5 M4 M5 M6 M8 M 10 DIN EN ISO 0 1 2 3 4 7045 Size designation for cross-head slots DIN EN ISO DIN EN ISO 0 1 2 3 4 7046 7047 Size designation for cross-head slots 2. Sheet metal screws Size ⌀ mm 2.2 2.9 3.5 3.9 4.2 4.8 5.5 6.3 DIN EN ISO 7049 DIN EN ISO 7050 DIN EN ISO 7051 1 2 3 Size designation for cross-head slots 3. Wood screws Size ⌀ mm 2 2.5 3 3.5 4 4.5 5 5.5 6 7 8 DIN 7996 DIN 7997 DIN 7995 0 1 2 3 4 i Size designation for cross-head slots 1231