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Threaded body: Steel, black oxide finish
Plunger pin: Steel, hardened and ground
Knob: Matte black glass fiber reinforced nylon plastic, not
removable
Lock nut: Steel, black oxide finish, DIN 439 / ISO
4035

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GN 817.2 indexing plungers are identical to GN 817 but with a longer knob.
Type with rest position is used in applications where the plunger must not protrude continually. In that
case, the knob is retracted and afterwards turned by 90°. A notch keeps the plunger in this position.
Maximum heat resistance of nylon plastic hand knob: 110°C (230°F).
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