321870-1 is a ring tongue terminal designed for use with 2/0 AWG solid or stranded wire, featuring a brazed seam construction and tin-plated copper finish per ASTM B-545. The terminal has a maximum recommended operating temperature of 170°C and is constructed from annealed copper per ASTM B-152 with a minimum tin plate thickness of 0.00254 mm. It is UL listed (File E13288) and certified to LR7189 standards, meeting military specification MS 20659-119 CLASS 2. The terminal features a 5/16 stud hole with a diameter of 8.33±0.13 mm and a maximum washer radius of 15.87 mm, making it suitable for high-reliability electrical connections in industrial and automotive applications requiring robust wire termination.