Dimensions: Inside diameter 6mm.
For 10mm key.
Total height : 9,5mm
Pitch of screw: 100
Thread length: 5mm
Two sizes exist, 6 or 7mm for your studs, check before ordering.
The 6mm are generally mounted on 50cc to 110cc and 7mm from 125cc.
Reference HONDA: 94021-060-000 MADE IN JAPAN !