The Studding that we keep in stock is Mild Steel Grade 4.8 or A2 Stainless Steel and all are Coarse threads.
These are normally good enough for most applications, but sometimes it's not enough, if not then let us know.
We are able to get stronger, Grade 8.8 and A4 if requested. We are also able to get Metric Fine threads. Please contact us for more information.
Also, please bear in mind there are several different metric fine pitches, for example;
M10 x 1.5 = Standard/Coarse
M10 x 1.25 = Fine
M10 x 1 = Extra Fine
Please ensure you are asking for the correct pitch and be aware that there are minimum order quantities for non-stock items.