Webley lock screw size

[Troubledshooter]

Baz,
if you would like a Webley Senior pivot bolt and keeper screw to measure, I can put one in the post for return when you've finished with it.
I did go into this on another thread some time ago. but can't find the measurements in my files.

I've now found the original drawings so will email the scans to you if you PM or email your email address.