# Socket head cap screws, M2–M8 (ISO 4762 / DIN 912)

> What are the head dimensions and clearance holes for M3, M4 and M5 socket head cap screws?

- Category: Hardware › Fasteners
- Kind: Hardware
- Basis: ISO 4762 / DIN 912; clearance per ISO 273 medium
- Page: https://xemstudio.com/objects/socket-head-cap-screws-metric/ · JSON: https://xemstudio.com/api/geometry?object=socket-head-cap-screws-metric · Plain text: https://xemstudio.com/objects/socket-head-cap-screws-metric/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

## Notes

- Head diameter ≈ 1.5 × thread, head height = thread diameter. Counterbore the head diameter + 0.5 mm, depth = head height + 0.5 mm.
- Clearance (medium): M2 2.4, M2.5 2.9, M3 3.4, M4 4.5, M5 5.5, M6 6.6, M8 9.0 mm. Printed holes: add ~0.2–0.3 mm.
- Tap drill: M2 1.6, M2.5 2.05, M3 2.5, M4 3.3, M5 4.2, M6 5.0, M8 6.8 mm.

## Sizes

| thread | pitch_mm | head_dia_mm | head_height_mm | hex_key_mm | clearance_mm | tap_drill_mm |
|---|---|---|---|---|---|---|
| M2 | 0.4 | 3.8 | 2 | 1.5 | 2.4 | 1.6 |
| M2.5 | 0.45 | 4.5 | 2.5 | 2 | 2.9 | 2.05 |
| M3 | 0.5 | 5.5 | 3 | 2.5 | 3.4 | 2.5 |
| M4 | 0.7 | 7 | 4 | 3 | 4.5 | 3.3 |
| M5 | 0.8 | 8.5 | 5 | 4 | 5.5 | 4.2 |
| M6 | 1.0 | 10 | 6 | 5 | 6.6 | 5.0 |
| M8 | 1.25 | 13 | 8 | 6 | 9.0 | 6.8 |

## Where the files are

- McMaster-Carr: [Socket head screws (free STEP/IGES/STL per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/screws/socket-head-screws/) — STEP, IGES, STL, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)
- Wikipedia: [List of screw drives / ISO metric screw thread](https://en.wikipedia.org/wiki/ISO_metric_screw_thread) — web — CC BY-SA 4.0 (text)

## Free STEP/STL (47 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/index.json

- shcs-m2x4: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2x4.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2x4.stl) — ISO 4762 M2 × 4, thread as plain cylinder
- shcs-m2x6: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2x6.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2x6.stl) — ISO 4762 M2 × 6, thread as plain cylinder
- shcs-m2x8: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2x8.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2x8.stl) — ISO 4762 M2 × 8, thread as plain cylinder
- shcs-m2x10: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2x10.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2x10.stl) — ISO 4762 M2 × 10, thread as plain cylinder
- shcs-m2x12: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2x12.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2x12.stl) — ISO 4762 M2 × 12, thread as plain cylinder
- shcs-m2.5x5: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x5.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x5.stl) — ISO 4762 M2.5 × 5, thread as plain cylinder
- shcs-m2.5x6: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x6.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x6.stl) — ISO 4762 M2.5 × 6, thread as plain cylinder
- shcs-m2.5x8: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x8.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x8.stl) — ISO 4762 M2.5 × 8, thread as plain cylinder
- shcs-m2.5x10: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x10.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x10.stl) — ISO 4762 M2.5 × 10, thread as plain cylinder
- shcs-m2.5x12: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x12.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x12.stl) — ISO 4762 M2.5 × 12, thread as plain cylinder
- shcs-m2.5x16: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x16.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m2.5x16.stl) — ISO 4762 M2.5 × 16, thread as plain cylinder
- shcs-m3x6: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x6.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x6.stl) — ISO 4762 M3 × 6, thread as plain cylinder
- shcs-m3x8: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x8.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x8.stl) — ISO 4762 M3 × 8, thread as plain cylinder
- shcs-m3x10: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x10.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x10.stl) — ISO 4762 M3 × 10, thread as plain cylinder
- shcs-m3x12: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x12.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x12.stl) — ISO 4762 M3 × 12, thread as plain cylinder
- shcs-m3x16: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x16.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x16.stl) — ISO 4762 M3 × 16, thread as plain cylinder
- shcs-m3x20: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x20.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x20.stl) — ISO 4762 M3 × 20, thread as plain cylinder
- shcs-m3x25: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x25.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x25.stl) — ISO 4762 M3 × 25, thread as plain cylinder
- shcs-m3x30: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x30.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m3x30.stl) — ISO 4762 M3 × 30, thread as plain cylinder
- shcs-m4x8: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x8.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x8.stl) — ISO 4762 M4 × 8, thread as plain cylinder
- shcs-m4x10: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x10.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x10.stl) — ISO 4762 M4 × 10, thread as plain cylinder
- shcs-m4x12: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x12.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x12.stl) — ISO 4762 M4 × 12, thread as plain cylinder
- shcs-m4x16: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x16.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x16.stl) — ISO 4762 M4 × 16, thread as plain cylinder
- shcs-m4x20: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x20.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x20.stl) — ISO 4762 M4 × 20, thread as plain cylinder
- shcs-m4x25: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x25.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x25.stl) — ISO 4762 M4 × 25, thread as plain cylinder
- shcs-m4x30: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x30.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x30.stl) — ISO 4762 M4 × 30, thread as plain cylinder
- shcs-m4x40: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x40.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m4x40.stl) — ISO 4762 M4 × 40, thread as plain cylinder
- shcs-m5x10: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x10.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x10.stl) — ISO 4762 M5 × 10, thread as plain cylinder
- shcs-m5x12: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x12.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x12.stl) — ISO 4762 M5 × 12, thread as plain cylinder
- shcs-m5x16: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x16.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x16.stl) — ISO 4762 M5 × 16, thread as plain cylinder
- shcs-m5x20: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x20.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x20.stl) — ISO 4762 M5 × 20, thread as plain cylinder
- shcs-m5x25: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x25.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x25.stl) — ISO 4762 M5 × 25, thread as plain cylinder
- shcs-m5x30: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x30.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x30.stl) — ISO 4762 M5 × 30, thread as plain cylinder
- shcs-m5x40: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x40.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m5x40.stl) — ISO 4762 M5 × 40, thread as plain cylinder
- shcs-m6x12: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x12.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x12.stl) — ISO 4762 M6 × 12, thread as plain cylinder
- shcs-m6x16: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x16.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x16.stl) — ISO 4762 M6 × 16, thread as plain cylinder
- shcs-m6x20: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x20.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x20.stl) — ISO 4762 M6 × 20, thread as plain cylinder
- shcs-m6x25: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x25.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x25.stl) — ISO 4762 M6 × 25, thread as plain cylinder
- shcs-m6x30: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x30.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x30.stl) — ISO 4762 M6 × 30, thread as plain cylinder
- shcs-m6x40: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x40.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x40.stl) — ISO 4762 M6 × 40, thread as plain cylinder
- shcs-m6x50: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x50.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m6x50.stl) — ISO 4762 M6 × 50, thread as plain cylinder
- shcs-m8x16: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x16.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x16.stl) — ISO 4762 M8 × 16, thread as plain cylinder
- shcs-m8x20: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x20.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x20.stl) — ISO 4762 M8 × 20, thread as plain cylinder
- shcs-m8x25: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x25.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x25.stl) — ISO 4762 M8 × 25, thread as plain cylinder
- shcs-m8x30: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x30.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x30.stl) — ISO 4762 M8 × 30, thread as plain cylinder
- shcs-m8x40: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x40.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x40.stl) — ISO 4762 M8 × 40, thread as plain cylinder
- shcs-m8x50: [STEP](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x50.step) · [STL](https://xemstudio.com/files/hardware/socket-head-cap-screws-metric/shcs-m8x50.stl) — ISO 4762 M8 × 50, thread as plain cylinder

## Questions

**What size hole for an M3 screw?**

Clearance 3.4 mm (medium fit, ISO 273); in a 3D print use 3.6–3.7 mm. Tap drill for cutting an M3 thread: 2.5 mm.

**How big is an M3 socket head cap screw head?**

Head diameter 5.5 mm, head height 3 mm, 2.5 mm hex key (ISO 4762). Counterbore 6.0 mm diameter, 3.5 mm deep.

**M4 and M5 clearance and tap drill sizes?**

M4: clearance 4.5 mm, tap drill 3.3 mm, head Ø7 × 4 tall, 3 mm key. M5: clearance 5.5 mm, tap drill 4.2 mm, head Ø8.5 × 5 tall, 4 mm key.

## Fits with

- [Hex nuts, M2–M8 (ISO 4032)](https://xemstudio.com/objects/hex-nuts-metric/)
- [Flat washers, M2–M8 (ISO 7089)](https://xemstudio.com/objects/flat-washers-metric/)
- [Heat-set threaded inserts, M2–M6 (for 3D prints)](https://xemstudio.com/objects/heat-set-inserts/)
- [Threaded standoffs, M2.5 and M3 (hex and round)](https://xemstudio.com/objects/threaded-standoffs-metric/)
- [Imperial machine screws: #4-40, #6-32, #8-32, 1/4-20](https://xemstudio.com/objects/imperial-machine-screws/)