RS PRO Slot Countersunk A4 316 Stainless Steel Machine Screws DIN 963, M3x20mm

Metric Thread - A4 Stainless Steel

They are usually graded, ensuring that it is easy to pick the right quality for the task
A4 grade 18//8 stainless steel (Type 316 S16)
Higher level of corrosion resistance than A2 S/S
Suitable for use in most food, medical, chemical, construction and electronic applications.
Often used for fixing guttering or in marine environment
Popular for precision engineering and use in wet or damp climate
For use up to 300°C