|Hand knob: Black phenolic plastic
(Duroplast PF), glossy finish
Threaded stud: Zinc plated steel, molded-in
||Star knobs with male thread increase
the range of
Should clamping with the hub face be necessary,
then it is recommendable to use either GN
or GN 6335.4-SG.
Maximum heat resistance of phenolic plastic: 150°C (300°F).