The preferred axle bolt for UDC Wide and Superwide hubs. Sold in pairs. Tighten using an 8mm allen key.
Just what I needed
Posted by ICEdaddy on Dec 26th 2016
Worked great on my new 125 mm Nimbus coterless cranks. Need new bolts for new cranks and these were awesome. Just make sure you have the right tool first (8 mm Allen head, which you can get as a tip for a socket wrench for about $2 at big box hardware stores).