ANSI/ASME B18.8.1 Cotter Pin Application Size Table Chart
Cotter Pins per ANSI/ASME B18.8.1
A cotter is a pin or wedge passing through a hole to fix parts tightly together. In British usage cotter pin has the same meaning, but in the U.S. it refers to a different fastener .
Typical applications are in fixing a crank to its crankshaft , as in a bicycle, or a piston rod to a crosshead , as in a steam engine. Note: the angle of the wedge determines the position of the parts being held, therefore on a bicycle the pedal arms will only be at 180 degrees to each other if the angle of the cotter pin's wedge is the same on both pins.
|.03125||0.032||0.060||0.010||0.125 to 3 by 1/8|
|.046875||0.048||0.090||0.020||0.125 to 3 by 1/8|
|.0625||0.060||0.120||0.030||0.25 to 3 by 1/8|
|.078125||0.076||0.160||0.040||0.25 to 3 by 1/8|
|.09375||0.090||0.190||0.040||0.375 to 3 by 1/8|
|.109375||0.104||0.220||0.050||0.375 to 3 by 1/8|
|.125||0.120||0.250||0.060||0.5 to 3 by 1/8|
|.140625||0.134||0.280||0.060||0.5 to 3 by 1/8|
|.15625||0.150||0.310||0.070||0.625 to 3 by 1/8|