[sdiy] Source for M6x0.75 Nuts

[Tom Bugs]

Hi all,

Gah -- I really need to source some fine-thread M6 nuts but can't find 
them for the life of me...

Regular M6 nuts are 1mm thread - I need 0.75mm thread - like on 
miniature toggle switches, for example.

Ideally I need a regular source for many at a time - preferably UK, but 
not necessarily...
Steel (no need for stainless) would be best but could maybe do with 
nylon if all else fails...

Thanks for any help!
Tom/BugBrand