Catalog > Electro-Mechanical Components > Panel Meters and Accessories > Accessories > Switch Knobs KNOB16-0020 Plastic Screw Type Control Knob Plastic Screw Type Control Knob • Black • Shaft Hole Size : 6.4mm Part No: KNOB16-0020 30.82 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Black Additional Information Model WTN-1184 Shaft Hole Size 6.4mm Base Diameter 26.8mm Top Diameter 22mm Height 15.8mm