Stoeger M3K stock bolt thread?

[Gazza]

Does anyone happen to know what thread the Stoeger M3K stock bolt is?
It verniers at 9.76mm/0.384" but is not M10.
I've included a picture with an M10 thread (bottom) for comparison.
The stock thread is noticeably finer than M10 so maybe imperial?

[Gazza]

Addition:

The thread is 28 TPI

[glevum]

I have seen 3/8 28tpi taps.

I think they were used on electrical fittings.

Stoeger is American so it is likely an Imperial thread

[Gazza]

I have emailed Stoeger so lets see how good their technical department are

[Gazza]

I just got a reply back from MOA precision and apparently the thread is M10 1mm.
A quick gander on ebay brings a single bolt in at 8 quid

[ovenpaa]

I was about to say M10 fine :)

Will the bolt on ebay do the job?

[Gazza]

I was about to say M10 fine :)

Will the bolt on ebay do the job?

Hopefully it will do the job Dave, yes.
I've ordered one so should be here Tuesday.