Correct screw/bolt covers for up close windows

[Longshanks]

Hi

Over time, most of our screw caps have disappeared. When I try to buy replacements, I always struggle and often get wrong ones. Our windows are about twenty years old. Have attached images of hole and cap bought previously (not necessarily the right one)

Can you advise please.

Thanks

L

 

[Longshanks]

V helpful.

Thanks

 

[Gazman16]

Google "round drainage caps for pvc windows" several showing up on ebay

 

[Longshanks]

Thanks. I thought these were so common would be readily available st DIY stores.

 

[Gazman16]

The round ones are a bit old and unusual

 

[Longshanks]

Thanks again.