|Knob body: Black nylon plastic, smooth glossy
Tapped through insert: Stainless steel, molded-in
European standard 1.4305
(American standard 303 series)
||On clamping applications, the partially
protruding stainless steel insert prevents chipping of the plastic.
All stainless steel knurled nuts, see DIN
Maximum heat resistance of nylon plastic: 110°C (230°F).