Material: Steel, black oxide finish, plunger pin hardened. Knob: Plastic Thermoplast (polyamide) black, matt finish, cannot be disassembled. Indexing plungers 817 offer the following advantages: - small outer dimensions - most of the release mechanism (version C/CK) is covered - defined thread length by an undercut at the end of the thread (version G/GK).

Version B/BK: With knob, without notched catch, this version is used where, on releasing the knob, the plunger pin should be returned to its initial position by the spring force.

Version C/CK: With knob, is used if the plunger pin has to remain in retracted position. To achieve this, the knob is rotated by 90 degrees after being retracted. A notched catch stops the locked-in knob from returning to its initial position accidentally or due to vibration.

Version G/GK: With threaded plunger end, for applications where a special knob to customer's request is required or where the plunger pin is not shifted manually.