Black self tapping M2 screw x 6mm long (round head, not flange or countersunk)
- Manufacturer: Various
- Product ID: Various
These sorts of screws often come in PC repair kits. Black is far preferable to silver coloured but fortunately these screws usually come in black.
Supplier Links
https://www.ebay.co.uk/itm/383056913339
Indicative Pricing With Allowance for P&P
These things are tiny any usually sold in packs of 50, 100 or even 500. Unfortunately we don't use these much in AuthentiKit controls and you will probably only use 2, maybe 4. You may be able to get a pack for as little as £2 putting the unit price at £0.50. With a bit of luck though you'll have some lying around.
£0.50
Substitutions
You can get away with as little as 5mm in length and 8mm at a push. You'd probably also get away with M2.3