M10 vs 3/8-16 UNC Screw Size Chart
Overview
Technical specifications for M10 metric and 3/8-16 UNC imperial fasteners. These are often confused due to their similar diameters.
Comparison Table
| Standard | Size | Diameter (mm) | Pitch / TPI | Tap Drill |
|---|---|---|---|---|
| Metric | M10 | 10.00 mm | 1.50 mm | 8.5 mm |
| Imperial | 3/8”-16 UNC | 9.53 mm | 16 TPI | 8.0 mm (5/16”) |
FAQ
Will an M10 bolt fit a 3/8-16 nut?
No. While they look similar, the M10 bolt (10.00mm) is physically too large to fit into a 3/8-16 nut (9.53mm). Additionally, the thread pitches are incompatible.
Source Standard
ISO 261 / ASME B1.1