This is a quick reference table for screw hole sizes when designing for 3D printing so you don’t have to ask google every time you need a hole size.
| Size | Tap | Clearance | Heat Set Insert | ||
|---|---|---|---|---|---|
| Tight | Normal | Loose | |||
| M2 | 1.6mm | 2.2mm | 2.4mm | 2.6mm | 3.2mm |
| M3 | 2.5mm | 3.2mm | 3.4mm | 3.6mm | 5.2mm |
| M4 | 3.3mm | 4.3mm | 4.5mm | 4.8mm | 6.2mm |
| M5 | 4.2mm | 5.3mm | 5.5mm | 5.8mm | 7.0mm |
| M6 | 5.0mm | 6.4mm | 6.6mm | 7.0mm | 8.0mm |
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