[TruckbusUK]

Hello dambat, Volvo say they are when I enquired however personally I would never reuse any TTY bolt ... why?

The main issue is with TTY bolts is that once you reach that Yield Point and return back to the elastic region, you’ve changed the crystal properties inside the steel and it’s permanently deformed, visually depending on the fastener used it can be obvious, others its not.

However its a personal choice.