Taipan Standard screws specs

Hi guys,
Got a small issue with my .22 Taipan purchased recently. The top 2 screws by the cocking level is showing a little sign of rust. Got the schematic from the manual but no specs list of the parts. Looking to replace all the screws with stainless. Any one know the specs of the screws? Or have the schematic parts list? Thanks.
 
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Like this one? Can you please tell me the length? Thanks
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