Spring contact Tip diameter: 2.5 mm Housing Material: Bronze (CuSn) / Gold-Plated Piston: Steel, Gold-Plated Pitch: 3.18 mm Series: PTR 1030 Sleeve: Bronze, Gold-Plated Spring: Spring Steel, Gold-Plated Tip style: 90° Convex Lift max.: 6.3 mm Overall length: 33.5 mm Plunger Diameter: 1.3 mm Pre-loaded spring force: 0.4 N Spring force at working travel: 1.5 N