Hand knob: Black phenolic plastic
(Duroplast FS 31), glossy finish
Threaded stud: Zinc plated steel, molded-in
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Star knobs with male thread increase
the range of
application. Should clamping with the hub face be necessary,
then it is recommendable to use either GN
6335.4-TE
or GN 6335.4-SG.
Maximum heat resistance of phenolic plastic: 150°C (300°F).
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