21 mm
Metric sockets are measured in millimeters while imperial sockets are measured in inches. Metric sockets are commonly used in countries that use the metric system, whereas imperial sockets are used in countries that use the imperial system. It's important to use the correct type of socket to match the measurement system of the fasteners being used.
with the correct type of socket and bar for easy access I had to use a crow bar as a socket wouldn't fit.
15 mm socket, but I think they are 3/8 national coarse thread.
whichever size fits tightly, probably a metric 15mm
Most GM veichles or metric. If i am correct its goingto be a 15 mm or 17 mm
It will be a metric size. Try different sizes until you hit upon the correct size.
No, you cannot use a metrc socket on a standard socket wrench. These are two different systems of measurement and are not interchangeable.
It takes a metric socket of either 13, 14, or 15MM.
10mm or 12mm metric 10mm or 12mm metric
Correct.
34 mm metric socket. They cost under teen bucks
There is a good chance that it takes a standard size socket rather than a metric socket, it was like this on my Toyota Celica. 17mm