XK150 fuel tank filter/drain plug thread size?

Hi XK followers
I am hoping somebody will be able to help with this query.
Thanks in advance.


Part No. C.990/1 Filter Assembly, at bottom of Tank.

Thread is 1-1/4" BSPP. So Major Diameter of 1.650" and 11 tpi

The hexagon nut is 1/2"BSW


Thanks Roger - that’s what I needed.