Could anyone help me find a retaining cap for an Aqua 50" brolly, please?

It's the screw that goes in the end of the short pole from the bell cap to hold the ribs up.

I have lost mine, but did get a screw for the fast and light, thinking it would fit, but it's a different thread size.

Happy to pay if anyone has one kicking around.

In reply to Post #1
If all else fails, a standard bolt/washer combi with the correct thread pitch should suffice as a stop gap.