I'm assuming with Canadian flag and a 'storm door' the OP does not reside in the UK .....Freddie is bang on with this......pop rivets can be used blind so just what you need!
I'd go for 5mm diameter (officially 4.9mm but 5 is fine), around 10mm long or whatever.
All you need is at Wickes or B&Q etc, and the spreader metal around 2mm thick.
John![]()
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