To convert from millimeters (mm) to inches:
| Factor | Value |
|---|---|
| 1 inch to mm | 25.4 mm |
| 1 mm to inch | 0.03937 inches |
A 321mm drill bit is commonly used in:
| Size (Mm) | Size (Inches) | Use | Page |
|---|---|---|---|
| 319 mm | 12.5590551181 inches | General purpose drilling | View |
| 320 mm | 12.5984251969 inches | General purpose drilling | View |
| 321 mm | 12.6377952756 inches | General purpose drilling | View |
| 322 mm | 12.6771653543 inches | General purpose drilling | View |
| 323 mm | 12.7165354331 inches | General purpose drilling | View |
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