Machinery's Handbook, 31st Edition
1854 Metric Self-Threading Screws Table 7. Approximate Drilled or Clean-Punched Hole Sizes for Steel Type AB Metric Thread Forming Tapping Screws in Sheet Metal Nominal Screw Size and Thread Pitch Metal Thick ness Hole Size Drill Size a Nominal Screw Size and Thread Pitch Metal Thick ness Hole Size Drill Size a Nominal Screw Size and Thread Pitch Metal Thick ness Hole Size Drill Size a
In Steel, Stainless Steel, Monel, and Brass Sheet Metal
0.38 1.63 52 0.46 1.63 52 0.61 1.70 51 0.76 1.78 50 0.91 1.85 49 1.22 1.85 49 1.52 1.93 48 0.38 2.18 44 0.46 2.18 44 0.61 2.26 43 0.76 2.39 42 0.91 2.39 42 1.22 2.44 41 1.52 2.54 39 1.90 2.59 38 0.38 2.64 37 0.46 2.64 37 0.38 … … 0.46 … … 0.61 1.63 52 0.76 1.63 52 0.91 1.63 52 1.22 1.70 51 1.52 1.78 50 0.38 … … 0.46 … … 0.61 … … 0.76 2.18 44 0.91 2.18 44 1.22 2.18 44 1.52 2.26 43 1.90 2.26 43 0.38 … …
0.61 2.69 36 0.76 2.69 36 0.91 2.79 35 1.22 2.82 34 1.52 2.95 32 1.90 3.05 31 0.46 … … 0.61 3.18 … 0.76 3.18 … 0.91 3.18 … 1.22 3.25 30 1.52 3.45 29 1.90 3.56 28 0.46 3.66 27 0.61 3.66 27 0.76 3.66 27 0.91 3.73 26 0.61 … … 0.76 2.64 37 0.91 2.64 37 1.22 2.64 37 1.52 2.69 36 1.90 2.79 35 0.46 … … 0.61 … … 0.76 2.95 32 0.91 3.05 31 1.22 3.25 30 1.52 3.45 29 1.90 3.56 28 0.46 … … 0.61 … … 0.76 … …
1.22 3.78 25 1.52 3.91 23 1.90 3.99 22 0.46 … … 0.61 4.22 19 0.76 4.22 19 0.91 4.22 19 1.22 4.32 18 1.52 4.50 16 1.90 4.62 14 0.46 4.98 9 0.61 4.98 9 0.76 4.98 9 0.91 4.98 9 1.22 5.21 W 1.52 5.79 1 1.90 5.89 … 1.22 3.66 27 1.52 3.66 27 1.90 3.73 26 0.46 … … 0.61 … … 0.76 … … 0.91 … … 1.22 4.09 20 1.52 4.22 19 1.90 4.39 17 0.46 … … 0.61 … … 0.76 … … 0.91 … … 1.22 … … 1.52 5.05 8
4.8 × 1.6
3.5 × 1.3
2.2 × 0.8
5.5 × 1.8
4.2 × 1.4
2.9 × 1
6.3 × 1.8
4.8 × 1.6
3.5 × 1.3
In Aluminum Alloy Sheet Metal
4.8 × 1.6
3.5 × 1.3
2.2 × 0.8
5.5 × 1.8
4.2 × 1.4
2.9 × 1
6.3 × 1.8
4.8 × 1.6
3.5 × 1.3
0.46 … … 1.90 5.11 7 a Customary drill size references have been retained where the metric hole diameters are direct conversions of their decimal inch equivalents. All dimensions are in millimeters except drill sizes. 0.91 3.66 27
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