Adjusting Rings (Shaft Collars with Set Screw) According to the Old Standard DIN 703, Steel, Zinc-plated

Material: Steel, zinc-plated.
Heavy-duty series. With allen set screw made from steel zinc-plated like DIN EN ISO 4027 (formerly DIN 914), but strength 12.9. From size d₁=70mm with 2 set screws, with offset 135°.
Bright turned and calibrated. Bores tolerance H8.
Large chamfer on one side of the outside diameter.
Temperature range: -40ºC to +175ºC.

* Size 20 is not part of the old standard DIN 703.