11-03-2020, 02:51 AM
The 10mm for a spark plug refers to the thread size, not the A/F of the hexagon body.
The three sizes in common use for cars and bikes are:
M14x1.25 = 13/16" hex
M12x1.25 = 11/16" hex
M10x1.0 = 5/8" hex
The 3/8 referred to on the packaging is the square drive size for the socket.
The three sizes in common use for cars and bikes are:
M14x1.25 = 13/16" hex
M12x1.25 = 11/16" hex
M10x1.0 = 5/8" hex
The 3/8 referred to on the packaging is the square drive size for the socket.
