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VB.239 Three-arm knobs
Duroplast, hub with pre-drilled hole
Main specifications
Material
High-strength, reinforced phenolic based (PF) Duroplast, black colour, glossy finish.
Standard execution
Black-oxide steel hub with uncovered front end and pre-drilled blind hole. See table for maximum permissible boring diameters d' and d".
General information
Applications
This knob has been designed for heavy duty work where the use of a hammer for a firmer clamping action is required.
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