[Rick Parkington]

Hi Thomas, perhaps worth saying that the actual thread size is 3/ 16 " Whitworth (or BSW). That means that the thread diameter is 3/ 16" (0.187").
Cheers RIck 

[Thomas]

Hi Paul, here is a pic of my screw. It is 20mm long, the head length is 4.5mm and its width is 7mm. Cheers, Thomas

[Thomas]

Good morning, that sounds great"
Tony, I sent you a PM with my email address.
Paul,  I'll check tonight and send the length then.
Cheers, Thomas

[phutton]

I have some stock of these. Let me know what length and I will send you one.

P.

[meddlesomebilly]

Hi Thomas,
In 2016 Paul Hutton made a comprehensive table of Sunbeam casing screws, if you let me have your e-mail address I'll forward a copy to you.
Tony.

[Thomas]

That would be great, Graham! These screws are quite difficult to get here in Germany and it would indeed help to know what it is.
Cheers, Thomas

[shorrog]

Hi Thomas
They are a standard imperial size but with a fillister head as standard.  I will check on my bike for the size.
Graham

[Thomas]

Hello! One of my screws for the primary chain case is broken. Any idea where I can get it? It is not in the club spares list. What thread does it have? Or should I directly ask Chris Odling to make one?
Cheers, Thomas