Spanner Bit Size for Fallkniven NL Series?

[Corvus Corax]

This is probably a longshot but does anyone know the correct size spanner bit for the Fallkniven NL series tang nut? There's a tiny bit of play in the handle of my NL1 and I really would like to tighten it up!

 

[Blues]

Just in case...

info@fallkniven.se

 

[Alberta Ed]

A needlenose pliers works pretty well on those -- I use my Leatherman. You can also find sets of assorted bits that might fit. That's a beautiful series of knives.