On 26/02/2021 13:10, Tim+ wrote:


Well I guess it is 3/8€� after all. Just seems odd that so many of the
engine bolts seem to be metric but not these ones. Live and learn.


But have you looked at the actual threads? Just because a metric spanner
is a close fit to the head size doesn't necessarily mean it's a metric
bolt. Metric spanners are a good enough fit on many UNF and UNC bolts.
--
Cheers,
Roger