Jaycar 50K Ohm Linear (B) Double Gang 24mm Potentiometer – PCB & Panel Mount

You need more range than a 25K gives you but a 100K is too coarse for the circuit you're building. This 50K linear double gang sits right in that sweet spot. 24mm body, full-size and solid. The shaft is genuine 6.35mm with a flat machined into 25% of the diameter — drop a grub screw or press-fit knob on and it stays. 38mm of shaft so your enclosure doesn't choke it. Solder it into a PCB and the six contact points on phenolic hold the whole thing rigid; no extra brackets. Centre pin is offset from the outer terminals, which keeps your trace routing clean. Panel mount? The 3/8" 32 T.H.D. bush does the job. Pins are big enough for screened cable if you're hard-wiring. 0.5W max. Standardised design, published drawing available for your layout

• 50K Ohm linear (B) taper, double gang, 24mm diameter
• Self-holding PCB mount — six contact points, no extra mechanical fixing needed
• 6.35mm shaft with 25% flat for grub-screw or interference-fit knob, 38mm long
• 3/8" 32 T.H.D. bush for secure panel mounting
• Pins sized to terminate screened cable for hard-wired builds
• 0.5W max power rating