Greasing the steering head bearings

[Bryn]

Greasing the Steering head bearings     Brian  ( BDF) has already posted stating it can be done by without much dismantling   

Anyone advise on what sized nuts there are to contend with please ?  I've got a mechanic mate who's going to do it , and he's asked the question, as he'll do it at my place, and wants to make sure we've got what we need