This is a knurled knob for M5 bolts and nuts(8mm head diameter). It is slightly wider so It fits on M5's just by being pressed hard, doesn't require any heat on the bolt to melt the knob in order to fit. I made it for the adjustment bolts on my car's headlights because I definetly couldn't apply heat to the leveling motors.
M5_Knob.stl | 758.1KB |