I took my awning off for the winter and cleaned the roof and channel. The two nuts that slide into the channel are made from mild steel and consequently, have gone rusty. I have now made new ones using stainless steel increasing the size to improve performance.
Hi Ian, I´m just doing mine now, also made them bigger so that they don´t spin around on removal.
Finding the stainless steel screws was easy but the nuts i couldn´t find them anywhere.So had to make them like you.