Metric/imperial screws

[sturzi]

Hi there
Recently I received my Izula II and wanted to remove the scales, but found out that non of my (metric) allen keys fit. So I assume they have some imperial measurements. This got me wondering.
On the Sebenza, as far as I can tell, there are metric screws (I'm talking about the dimensions of the allen head, not the threads). Since the Sebenza comes with an allen key, I was wondering if this is the exception in the US, and they do that because not everyone has a metric allen key.
Therefore the question: Is there more or less chaos with metric/imperial measurements in the US, or are the metric screws the exception?
And does anyone know if the threads on the Sebenza are metric?

To remove the scales I filed a key myself, I wouldn't know where to find imperial stuff here.

And to finish, a quiz question: What do Burma, Liberia and the USA have in common?
These are the only countries who refuse to adopt the metric system as the official system of measurement.

 

[Obsessed with Edges]

I just checked the size of my Sebenza's allen key with a dial caliper, and also compared it against one of my Bondhus allen wrenches (verified in the screws on the knife). Across the board, it all matches up to 5/64" SAE. Definitely not metric.

 

[sturzi]

5/64 in = 1.984375 mm, that explains it I guess.

 

[Phydeaux]

I like to check the screw with a pitch guage. I have a metric and standard ones. Between using the guages, measuring the od, and looking on a chart , I can figure out what size the threads are.

Ric