Common Bolt Diameters And Wrench Sizes - BMW 1999-2005 M3 Service Manual

General
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Sockets. Sockets are used with a
ratchet handle for speed and
convenience and can be combined with
extensions and universal joints
(swivels) to reach fasteners more
easily. The most common drive sizes
are 1/4 in., 3/8 in., and 1/2 in.
Sockets come in 6-point and 12-point
styles. The 6-point offers a better grip
on tight nuts and bolts. 6mm to 19mm
sockets are the most needed sizes.
Below is a list of typical bolt diameters
and the corresponding wrench sizes.
Common bolt diameters and
wrench sizes
M5
M6
M8
M10
M12
M14
Spark plug socket. A special socket for
spark plugs is the correct size, is deep
enough to accommodate a spark plug's
length, and includes a rubber insert to
both protect the spark plug from
damage and grip it for easier removal.
Pliers. There are many types of pliers
including snap-ring, needlenose,
adjustable-joint, slip-joint
(Channellock®), and locking (Vise-
Grip®) most of which are used for
8 mm
10 mm
12 mm or 13 mm
17 mm
19 mm
22 mm
2/25/2009 10:09 PM