Material:
Handles and thrust washer fiberglass reinforced plastic PA 66.
Hinge pins 1.4305 stainless steel.
Screw and washer steel quality class 5.8 or 1.4305 stainless steel.
Version:
Grip black or traffic red RAL3020.
Thrust washer black.
Hinge pin bright.
Stud and washer trivalent blue passivated or bright stainless steel.
Note:
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), this can cause reduced clamping force.
Drawing reference:
1) setscrew for fine adjustment of lever