Our female through holed wing knob has a firmly pressed nut inside and is designed for a comfortable and non-slip grip.
* References with outer diameter 27 and 37 are made of PA6 (Nylon) .
* References with outer diameter 47 and 67 are made of PA630% GF (Nylon with fiberglass reinforcement) .
Zinc Plated Steel is used for the threaded insert, although on request it is possible to supply special threaded inserts in Stainless Steel or other materials.