Handle bar electronic switch enclosure was designed to mount over the (29mm diameter) handle bar grip on a Honda 4 wheeler and is used to turn a pull behind sprayer on and off. It uses a 16 Amp rocker switch I picked up at the Hardware store (Servalite 780704U Mini Rocker Switch SPST ON-OFF 16A, 12VDC). I also picked up 2 Phillips pan head # 8 x 1 1/2" long Stainless Steel screws used to fasten the mount to the handle bar grip...switch needs to be easy to operate and there is no room to mount to the bars inward from the grip so I made it as narrow as possible to limit the amount of the grip it covers...still plenty of room for most hands and it doesn't interfere with the other controls. The wires need to be soldered on to the switch terminals which will be trimmed to fit inside the enclosure and routed out through the angled hole in the side.
Printed with Taulman 910 Nylon....the internal threads should match up with a #8 wood screw...with approximately a 1.6mm pitch