Elma 020-1120 – Round Shaft Knob, 3mm
The Elma 020-1120 is a black round knob made of nylon (polyamide) with a glossy finish. It has a compact 9mm knob diameter — the smallest size in the Classic Collet range — and is designed for a 3mm round shaft, fixed onto the shaft using the proven collet tightening method. Its small footprint makes it ideal for space-constrained panel and instrument controls.
Quick spec sheet: