Hand knob: Black phenolic plastic (Duroplast FS 31), glossy
Hub: Stainless steel, molded-in
European standard 1.4305
(American standard 303 series)
||Hand knobs GN 6336.1 with stainless steel hub have important advantages:
The face of the hub is exactly square to the bore and is
made of stainless steel to prevent edge breakages.
Stainless steel hand knobs with male thread, see GN
Maximum heat resistance of phenolic plastic: 150°C (300°F).
Special stud variations, either drilled and pinned or glued
into place, available upon request.