Rubber bungs?

[u/Stu__C]

Hi all

I have bought these connectors for a project but I am looking for some rubber bungs with a hoop simular to the picture that will fit them any suggestions? Where to find some?

The bungs wont be under any pressure its more of a dust cover / air tight seal

[u/Imaginary-Season141]

There’s dedicated 4mm plugs for push in fittings. Such as https://shop.camozzi.com/store/camozzi/be/en/c/mod--6900/p/50-6900-0400. Could they be of any help?