Number of conductors 2 (7146), 3 (7157) Contact resistance < 0.05 Ohms Dielectric strength 500 V dc Insulation resistance 1000 MOhms Maximum panel thickness: .25 inch (6.35 mm) for .375 inch (9.5 mm) long bushing. Model 7156: 2-Conductor (mono), .205" Faston terminals and .375" (9.5 mm) long bushing.