Machine Screw Countersunk Head Slotted M3X30 Black Zinc Plated micro screw
- 1 unit
- 10 units
- 100 units
- 500 Units
screws
nuts
washers
Threaded Rod
Boxes / Tools
Chandlery
| Number of pieces | 1 | 10 | 100 | 500 | 2000 |
| Lot price VAT included | £3.69 | £7.33 | £8.81 | £11.98 | £47.90 |
How do I measure the length of a screw?
The length of a countersunk screw is measured with the head. For all other heads, the length is measured under the head.
All our zinc-plated parts meet this specification (unless otherwise stated).
🛡️ Corrosion protection: low
Thin 3 to 5 µm zinc coating, suitable for environments with low exposure.
🧂 Salt spray resistance: 24 to 96 h
Indicative resistance before the appearance of rust, depending on the coating finish.
🏠 Recommended environment
Indoor applications or environments with very low exposure to moisture.
🔩 Threads preserved
The low coating thickness limits dimensional variations and helps maintain thread accuracy.
| Diameter | 3 | 4 | 5 | 6 | 8 | 10 | 12 |
| Head diameter | 5.6 | 7.5 | 9.2 | 11 | 14.5 | 18 | 22 |
| Head Tickness | 1.65 | 2.2 | 2.5 | 3 | 4 | 5 | 6 |
| Slot width | 0.8 | 1 | 1.2 | 1.6 | 2 | 2.5 | 3 |
Use in metal anchors Moly anchor
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2026-08-23
For an entrance door lock I,initially 40 mm, following insulation of the door I need 30 mm more.