Bleed Cup Adapter Bolt Wizard please ensure your star nut

please ensure your star nut is completely straight inside the steerer tube

This measurement refers to the diameter of the end of the hub axle

then an oversized cup can be installed

You can easily measure the bolt length you have with a tape measure

so here is a much stronger solution

Bleed Cup Adapter Bolt Wizard please ensure your star nutAdapt the Pinner Bleed Cup to fit onto your brake lever of choice. These fine looking pieces of bling, machined from solid brass hex stock are available in three different thread sizes. Choose the thread that fits your brake, or build yourself a complete kit of adapters to suit any occasion. Please remember to check the thread specification of the lever bleed port on the brake you plan to bleed before purchasing.