Material: Steel. Threaded sleeve 1.0718. Indexing pin 1.4305. Mushroom knob black grey thermoplastic. Version: Indexing pin not hardened. Threaded sleeve zinc plated, blue passivated. Indexing pin bright. Note: This article is a cost-efficient alternative to the existing indexing plungers. It is suitable for applications which require less precision. The max. tightening torque should be observed when assembling.