Dial 911 SCS Washer 5mm
The SCS Washer is a cap that is mounted in the SCS and through which the compression screw passes. Thanks to this cap, compression occurs and your scooter stays properly tightened.
There are two sizes available, Standard and Oversized, and they are chosen according to the SCS socket you have. The millimeters in the name indicate the size of the hole for the compression screw.