- ss 180.jpg (64.2 KiB) Viewed 663 times
- 9.16 spark plug socket.jpg (71.07 KiB) Viewed 663 times
This may be more of a applications question than a tool question. My grandfather had 9/16 deep socket marked for spark plugs only. I also read on ths site that there were spark plug sockets 9/16 to 1 inch in 1941 . Does anyone have any idea what cars tool such a wide range of spark plugs? Thank you