You've got one of those 9mm mini potentiometers and the knob either won't sit flat or slides off after two turns. This 15mm black push-on knob drops straight onto the shaft. No grub screw to hunt for, no wobble. Fits all standard metric shafts, so if your pot's a 6mm or 8mm metric, it'll seat cleanly and stay
| brand | Jaycar |
| diameter_base | 15mm |
| diameter_top | 11mm |
| height | 14mm |
| fit_type | Push-on metric |
| compatible_shafts | All standard metric shafts, 9mm mini potentiometers |
| colour | Black |
| sku | HK7770 |