Thumbwheel for jam-nuts (M5)

thingiverse

I'm dealing with a situation where the countersunk head of a bolt is completely out of sight, making it impossible to access with a screwdriver or allen key, so I had to come up with a creative solution - creating another grippable surface to turn the bolt. To achieve this, I've used two nuts pressed tightly together to form a fixed part that can be easily gripped. However, this setup doesn't offer the necessary fine-tuning sensitivity I need, which is why I opted for a thumbwheel. Since the two jammed nuts don't align perfectly, I ruled out using a plastic insert for both nuts, so instead I chose a two-part thumbwheel held together by 3xM3x10mm bolts. This design allows me to remove the bolt from its setup and perform any necessary maintenance or servicing without any hassle. While I'm not sure if this solution would be useful to others, I've uploaded it to Thingiverse for anyone who might find it convenient or helpful.