Spring contact Housing Material: Brass (CuZn) / Gold-Plated Piston: Gold-Plated Grass Pitch: 2.54 mm Series: PTR 5322 Spring: Spring Steel, Gold-Plated Tip style: Round Head Lift max.: 1.4 mm Overall length: 4.78 mm Plunger Diameter: 1.07 mm Pre-loaded spring force: 0.25 N Spring force at working travel: 0.85 N Working stroke: 0.7 mm