Compression Rings were originally developed for use in all types of knob-to-shaft applications on thermoplastic nobs with split hubs. They are also used as a Compression Limiter inside a bolt hole, to protect plastics from cracking when the bolt is tightened. (* Note: Parts listed below vary in style and shape. Contact EFC International directly for prints, or more corrosion-resistant options.)
Knob-to-Shaft Provide a secure attachment and strengthen knob hub. Squeeze the hub around the shaft insuring firm, reliable retention.Compression Limiter Fit inside the bolt hole, and protect plastic host from cracking as the bolt is tightened.