M16 vs 5/8-11 UNC Screw Size Chart
Overview
Technical data for M16 metric and 5/8-11 UNC imperial heavy fasteners. These are often used in structural applications where precision is critical.
Comparison Table
| Standard | Size | Diameter (mm) | Pitch / TPI | Tap Drill |
|---|---|---|---|---|
| Metric | M16 | 16.00 mm | 2.00 mm | 14.0 mm |
| Imperial | 5/8”-11 UNC | 15.88 mm | 11 TPI | 13.5 mm (17/32”) |
FAQ
Is M16 interchangeable with 5/8?
No. While their diameters are very close (16.00 mm vs 15.88 mm), the thread pitches are different. Attempting to force them together will strip the threads.
Source Standard
ISO 261 / ASME B1.1