Thermoset PF 31, black or red.
Bush electro zinc-plated steel.

High-gloss polished.

According to DIN319, for production reasons, the usual tolerances for metal threads cannot be held with plastic threads.

Assembly Form L: The ball knobs are mounted firmly by tapping a hammer lightly. Please only use a rubber or plastic hammer, with a weight up to 200 g!

The version 06250-21604 has a brass bush.
The versions 06250-23008, 06250-230081, 06250-23508 and 06250-24008 have copper-plated steel bushes.

Ball knobs with press-fit sleeve can be mounted on standard shafts with tolerance h9. The supplied press-fit sleeve assures a firm and reliable fit.

Form C: moulded thread
Form E: tapped bush
Form L: press-fit sleeve
Form M: tapered hole