These cam levers have a technically optimised plastic thrust washer.
The thrust washer is made of a special high-performance plastic that guarantees very good wear and creep resistance.

Handle stainless steel 1.4308.

Thrust washer high performance carbon-fibre reinforced thermoplastic.

Hinge pin and stud stainless steel 1.4305.

Handle electropolished or abrasive blasted.
Thrust washer, black.
Hinge pin and stud bright.

Adjustable cam levers are used if the position of the lever relative to the axis of tension only permits one specific position (interference circle). The exact position of the lever is adjusted using a screwdriver on the fine thread setscrew.
Plastics are subject to creeping under load (retardation).

1) setscrew for fine adjustment of lever

For slightly curved contact faces, a stainless steel washer K2130 can also be ordered.
This washer can be mounted between the thrust washer and the contact face.