Ring tongue design assures a secure connection in high vibration applications Metal insulation grip sleeve crimps to wire insulation, providing protection to the crimp joint during high vibration applications Internal barrel serrations assure good wire contact and maximum tensile strength UL Flammability UL 94V-2/HB, maximum insulation temperature 221°F (105°C) UL and CSA rated up to 600 V per UL 486A/B