62311000 Clamp Collar steel black oxide

Material: Steel C45, black oxide finish. Screw steel 12.9.
Features:
does not damage the shaft, stronger clamping force than with set
collars, even distribution of clamping forces, easy readjustment,
precision honed bores. The threads of the screws DIN 912 are covered
with a layer of polyamide. Tolerance b: +0.08mm -0.25mm .
Temperature range: -40°C to +175°C.
Remarks to collars from
steel:
The black oxide on the clamping collars is formulated as part
of the total performance of the product. It enhances the holding ability
of the collar, it efficiently reduces slipping on the shaft, has
anti-stick-slip characteristics and helps to keep the torque rating of
the screw within its designed parameters. The oxide layer also provides
corrosion protection.