Finding the right Strat knob.
Strat knobs are made in PLASTIC push in. Always 6mm diameter hole. 3 kinds Metric with 18 splines. US 24 splines. Universal without splines (Nowadays, Fender uses this kind of knobs)
CTS = US. ALPHA or nothing on the pot = METRIC.
You can find Strat knobs in METAL with screw on side.2 kinds : 6mm and sometimes 6.35mm (1/4") for solid shafts (rare but we have some !