This part is not recommended for new designs. Please use the High Strength Hex Hub instead. If you have an old design and still need to use this part, please email regarding remaining availability.
Expand your team's building options without giving up the products that you already own. This hub allows teams to use their existing wheels and gears with the improved reliability of a 5mm hex shaft. Adapter is compatible with Tetrix and AndyMark gears and wheels that feature a 4-hole mounting pattern.
*Note: The hex hole in these hubs is a bit larger than we would like (5.3mm instead of 5.1). We have tested these hubs and they will not slip on the hex shaft, but there is a larger backlash then we would like. We are working to improve the tolerance for our next production batch. In order to provide a better experience we will now be including a small strip of shim stock stickers to improve the fit. The shim stock is the same one sold here http://www.mcmaster.com/#1143n22/=14fa4aw