Rotary knob, 6 mm, aluminum, black/silver, Ø 18 mm, H 20 mm, 538.621

Aluminum knob with setscrew lock, type Mentor 538.621

For reliable retention of adjustment values. The component shaft can be driven by means of friction coupling when the knob is pressed and moves freely without locking torque if not pressed. For 6.0 mm shafts, with indicator dial.

Knob: dull anodized aluminum, with black plastic cap

Indicator dial: translucent thermoplastic, with black index

For 6.0 mm shafts, with or without indicator dial