M2 Screw Size Chart – Head Dimensions, Drive Sizes & Thread Pitch | Monster Bolts
M2 screw and bolt sizes are commonly used in miniature assemblies, electronics, micro-RC, and precision devices. Use this chart to quickly find head height, head diameter, and drive size for popular M2 types. 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 M2 is M2-0.40.
Metric M2-0.40 (Coarse) – Dimensions & Drive Sizes
| Type | DIN | ISO | Head Height | Head Diameter | Drive Size |
|---|---|---|---|---|---|
| M2 Hex Bolts (FT) | 933 | 4017 | 1.525 mm | 4.3 mm* | 4 mm WAF |
| M2 Hex Bolts (PT) | 931 | 4014 | 1.525 mm | 4.3 mm* | 4 mm WAF |
| M2 Socket Head Cap | 912 | 4762 | 2.0 mm | 3.98 mm | 1.5 mm hex |
| M2 Low Head Socket Cap | 7984 | — | 1.3 mm | 3.8 mm | 1.3 mm hex |
| M2 Button Head Socket | 9427 | 7380 | 1.3 mm | 3.5 mm | 1.3 mm hex |
| M2 Flat Head Socket | 7991 | 10642 | 1.2 mm | 3.8 mm | 1.3 mm hex |
| M2 Phillips Flat Head | 965 | — | 1.2 mm | 3.8 mm | #1 Phillips |
| M2 Phillips Pan Head | 7985 | 7045 | 1.72 mm | 4.0 mm | #1 Phillips |
All of these pair with matching M2 nuts and M2 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 M2 fasteners — fast shipping from Milton, Florida.
M2 FAQs
What hex key fits an M2 socket head cap screw?
Typically a 1.5 mm hex key. Low-head, button, and flat socket styles commonly use a 1.3 mm hex.
What nut fits an M2 screw?
M2 screws pair with M2 nuts and M2 washers. Metric sizes always match by nominal diameter.
What is the standard M2 thread pitch?
Standard coarse pitch is M2-0.40. Fine-pitch options exist but are less common—always verify your tapped hole or nut.
Is an M2 the same as a #1 or #2 screw?
No. M2 (~2.0 mm) is close to some small #-sizes, but they use different thread systems and are not interchangeable.