Positioning and locating screw - Screw for positioning and indexing - Spring plunger with LONG-LOK anti-vibration treatment - For locating and positioning - Hexagonal socket - Materials: Body: blackened steel (class 5.8) Pin: plastic LONG-LOK nylon thread - Finish: Body: black oxide (steel) Advantages - Vibration proof - High torque required to unscrew - Mounts securely in any orientation Application - Use where spring plungers are repeatedly installed and removed