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M3 - M8
M3 to M8 cross countersunk screws group the main metric size route for flush-fitting plastic fastener sets.
How should you narrow these sizes?
Use the individual M3, M4, M5, M6 and M8 pages to match thread diameter and length before choosing material or colour.
Countersunk cross heads are selected where the screw head needs to sit flush in the fixing surface.