M1.6 Screw Size Chart – Head Dimensions, Drive Sizes & Thread Pitch | Monster Bolts
M1.6 screw and bolt sizes are common in micro-electronics, small mechanisms, and precision assemblies. Use this chart to quickly find head height, head diameter, and drive size for popular M1.6 head styles. If you’re new to standards, DIN and ISO numbers are the exact identifiers that define official dimensions (e.g., DIN 912, ISO 7380). Standard coarse thread for M1.6 is M1.6-0.35.
Metric M1.6-0.35 (Coarse) – Dimensions & Drive Sizes
| Type | DIN | ISO | Head Height | Head Diameter | Drive Size |
|---|---|---|---|---|---|
| M1.6 Hex Bolts (FT) | 933 | 4017 | 1.225 mm | 3.41 mm* | 3.2 mm WAF |
| M1.6 Hex Bolts (PT) | 931 | 4014 | 1.225 mm | 3.41 mm* | 3.2 mm WAF |
| M1.6 Socket Head Cap | 912 | 4762 | 1.6 mm | 3.14 mm | 1.5 mm hex |
| M1.6 Low Head Socket Cap | 7984 | — | — | — | — |
| M1.6 Button Head Socket | 9427 | 7380 | — | — | — |
| M1.6 Flat Head Socket | 7991 | 10642 | 0.5 mm | 2.4 mm | 1.3 mm hex |
| M1.6 Phillips Flat Head | 965 | — | 0.5 mm | 2.4 mm | #0 Phillips |
| M1.6 Phillips Pan Head | 7985 | 7045 | 1.3 mm | 3.2 mm | #0 Phillips |
All of these pair with matching M1.6 nuts and M1.6 washers.
Legend: PT = Partial Thread, FT = Full Thread. * = Width Across Flats (hex).
- Metric Thread Pitch Table • US TPI (comparison)
- How to Measure Length & Diameter • Printable Ruler (to scale)
- Shop all M1.6 fasteners — fast shipping from Milton, Florida.
M1.6 FAQs
What hex key fits an M1.6 socket head cap screw?
Typically a 1.5 mm hex key. Flat head styles often use a 1.3 mm hex.
What nut fits an M1.6 screw?
M1.6 screws pair with M1.6 nuts and M1.6 washers. Metric sizes always match by nominal diameter.
What is the standard M1.6 thread pitch?
Standard coarse pitch is M1.6-0.35.
Is M1.6 the same as #0-80?
No. While similar in scale, #0-80 is an inch-series thread; it is not interchangeable with M1.6 metric threads.