The Brass Union 5/16" SAE is a precisely manufactured union designed to join two female 5/16" lines together securely. Featuring a durable brass construction, this union can easily be secured using standard automotive tools and offers maximum pressure corrosion resistance. Compatible with both gasoline and diesel engines, this product is great for maintenance on older vehicles or classic cars. Features: - Rugged constructed from premium brass - Corrosion resistant for long lasting use - Compatible with both gasoline and diesel engines - Can be easily secured with standard automotive tools Benefits: - Connect two fuel, brake, or transmission lines securely and easily - Perfect for maintenance on old vehicles or classic cars - Offers maximum pressure retention for secure connection