No-one picking up on this one so I've dug out the forum pitch gauge!!
Starting with the larger nuts, both wheel spindle and the swingarm nut are 14 x 1.5mm, same nuts used on all 3.
Centre stand pivot, 12 x 1.5mm
I don't believe there is a 10mm castle nut on the 350 but if there is, it will be 10 x 1.25mm. I have a 10mm shoulderd bolt in my spares box but may not be off a BS.
Both rear brake arm nuts are 8 x 1.25mm. Note they have different part numbers so may vary in height. Can't check the forward one without standing on my head, don't do that these days
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I've noticed stainless castle nuts are now commonly available. You can safely buy SS for the 8mm size , they are ISO but may not easily find our JIS nuts in the larger sizes. May have to be made.
Trust I've covered them all, Brian.