|Knob body: Aluminum, black anodized finish
Torque mechanism: Steel, blackened finish
Other components: Steel, hardened
Cover cap: Plastic, light gray matte
GN 3663 torque limiting knobs are used when manually applied torque is to be limited.
When turned clockwise, the torque mechanical system of the knurled knob triggers an "over-engagement" as soon as the specified torque is reached. When tightening, this insures that maximum permissible torque is not exceeded. When turned counter-clockwise, loosening the knob mechanism, the mechanical system locks so that the torque is not limited. Torque necessary for release will always be transmitted properly.
After removal of cover and loosening of the countersunk screw, threaded or plain bore insert can be dismantled.
Versions with inch size threaded or plain bores available upon request.
For version with threaded stud see GN 3663.