Small Dress-Up Bit

Looks good Simon, I have the same one off the Speedmaster (the Moorish ones) & was wondering if I could use it anywhere.. is it the exact size thread or did you have to trim it :?:
 
The seat bolt fits without trimming.

It was the first (and probably the last) time I've spent £20 on a bolt, so I wanted to make sure I got my moneys worth out of it