BMW e36 M3 Clutch Pedal Rebuild -- discussing the ECS kit, two types of clutch springs, UUC bushings 

Turner Motor Sport list it as the previous comments stated.... throttle cable grommet..... ps great video..... thanks for your efforts.... hi from Australia

Yup that's the bushing for throttle cable

I believe that is the accelerator pedal grommet for the throttle cable. Like you mentioned.

Can Sophie’s hold the spring tension?

Very helpful

There is a grommet on the accelerator pedel to hold the throttle cable.

very helpful hank! thank you! also PMed you BF.c