Elma 021-3420 – Round Shaft Knob, 6mm
The Elma 021-3420 is a black rotary collet knob with an indicator line, made of nylon (polyamide) with a glossy finish. It has a 14.5mm knob diameter and is designed for a 6mm round shaft, fixed in place using the collet tightening method. Commonly used with rotary switches, it's RoHS compliant.
Quick spec sheet: