Shutter Precision Connector Cap
Shimano Connector Cap
Sturmey Archer Connector Cap
Note for Sturmey Archer Dynamo Hubs:
In our experience, we have found that while most connector caps of the Shimano/ Shutter precision type are interchangeable - we have discovered that Sturmey Archer dynamos connector caps seem to only be interchangeable with ones made by Shutter Precision.