These plastic mounting brackets are specifically designed to work with our Pololu mini plastic gearmotors. Both the offset and 90-degree configurations of the mini plastic gearmotors are compatible with these brackets. The brackets are sold in pairs, and four M3×12mm screws and M3 nuts are included (two for each bracket). In some orientations, the mini plastic gearmotors have a lip that causes the bracket to be raised off of the mounting surface; for those cases, two 1.25mm-thick spacer plates (one for each bracket) are also included. You can see the spacer being used in the pictures above.
Note: When using this tall version of the bracket with one of the 90° Output mini plastic gearmotors, only our 60mm-diameter wheels (or smaller) will fit in the space between the output shaft and the mounting tab. The mounting tab will rub or interfere with larger-diameter wheels.