It is a different size standard. There is SAE, Metric and Whitworth.

Mike
MU-2


"Morgans" wrote in message
...

"ORVAL FAIRAIRN" wrote

h. WHITWORTH SOCKETS: Once used for working on older British cars and
motorcycles, they are now used mainly for impersonating that 9/16 or
1/2
socket you've been searching for the last 15 minutes.


I am not familiar with the Whitworth socket. What is the significance, as
used here?
--
Jim in NC