Check the listing for details. Ball Knob 19mm diameter M5 thread tractor controls levers lathes tools hydraulic. Condition: New, Made in China. Listed at 3.73 USD. Check out my other items! Threaded Ball Knob Female (moulded thread): 19 17 M5 The UK supplier has been manufacturing plastic machine knobs since 1927. Today they supply one of the most comprehensive ranges of thermoplastic and phenolic (Duroplast or Bakelite) knobs available. From clamping knobs and grip knobs, to spinner knobs and ball knobs, it is very likely we have a suitable knob for your application Discounts for larger orders Any questions please ask Check out my other items. Ball Knobs, Scallop Knobs, Bridge handles, Star knobs, Wing knobs, Clamping handles Suitable Applications: Medical aids and equipment Industrial machinery .Aerospace equipment Construction equipment Agricultural machinery Electronics enclosures Printing equipment Packaging and processing equipment Li.