1957 BSA B31 sump plug

[Ysbytymike]

Help please.  Took the 'sump plug' off the bike as I was taking the clutch off to clean but cannot find it now!!! The bike seems to have an aftermarket plate, so I'm
assuming its not the factory plug I've lost. Anybody know the diameter and thread these plugs have with the new style plates (assuming their a std size)?
Thanks in advance
Mike

[mark2]

is it the finned alloy type

[Ysbytymike]

Phew.. "Found it".

Forgot about the magnetic section on the plug. I grabbed all my spanners together after I'd finished with them and put them back in my toolbox draw, and the blinking thing had stuck to them when I picked them up.
Didn't even occur to me too look in there, until I was reviewing some of the pictures I'd taken of the job and saw the plug in amongst the spanners on my bike lift.

Thanks for looking and replying folks.

[wink]

I always wipe my tool before putting them away.