Selecting the correct point size
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| Point Size | Body Diameter | Wood Screws | Machine Screws | Sheet Metal Screws |
| 0 | No.0 1 |
No.0 1 |
No.0 1 |
|
| 1 | 3/16 | 2 3 4 |
2 3 4 |
2 3 4 |
| 2 | 1/4 | 5 6 7 8 9 10 |
5 6 8 10 — — |
5 6 7 8 10 — |
| 3 | 5/16 | 12 14 16 |
12 1/4 5/16 |
12 14 5/16 |
| 4 | 3/8 | 18 20 24 |
3/8 7/16 1/2 |
3/8 — — |
Metric/Standard Conversion
Chart for Sheet Metal Screws
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| Diameters | Lengths | ||
| Standard (Inches) | Metric (Millimeters) | Standard (Inches) | Metric (Millimeters) |
| 2 4 6 |
2.2 2.9 3.5 |
1/4 3/8 1/2 |
6.5 9.5 13 |
| 7 8 10 |
3.9 4.2 4.8 |
5/8 3/4 7/8 |
16 19 22 |
| 12 14 |
5.5 6.3 |
1 1-1/4 1-1/2 |
25 32 38 |
| 1-3/4 2 |
45 50 |
||
All D.l.N. and I.S.O. Metric Sheet Metal Screws are actually standard inch sizes that are converted into millimeters. If you are quoting a metric sheet metal screw you can offer a standard sheet metal screw by using this chart.
Example:
#5 x 112 is also 3.5 x 13