The 51989-2 is a COPALUM Lite sealed terminal and splice connector designed for lightweight, high-reliability terminations in aerospace applications. It features aluminum base material with tin over nickel plating finish, utilizing proven dry crimp technology that eliminates the need for messy greases and provides oxide-free terminations through a perforated insert that penetrates aluminum oxides on the conductor. The product achieves up to 60% weight savings compared to copper terminals and 53% weight savings versus drop-forged aluminum terminals, while maintaining a temperature rating of 175°C and sealed crimp pressure of 80 psi. Available in single-hole lug, dual-hole lug, and butt splice configurations with wire sizes ranging from AWG 2 to 4/0 and current ratings from 152 A to 303 A, the 51989-2 is qualified for commercial aircraft, unmanned aerial vehicles, primary power feeders, and grounding systems where lightweight, reliable connectivity is essential.