The maximum heat resistance of the nylon plastic hand knob is 110C or 230F. A notch keeps the plunger in this position. In that case, the knob is retracted and afterwards turned by 90 degrees.
This Type, includes a rest position and is used in applications where the plunger must not protrude continually. GN 817.2 indexing plungers are identical to GN 817 but with a longer knob. Indexing Plunger Long Knob w/ Rest Lock Nut Black 4.5x12.5N Pressure M8x1 Thread 4x4mm Pin
