3-51864-1 is a ring tongue terminal designed for 16–14 AWG solid or stranded wire applications. The terminal features a copper body per ASTM B-152 with tin plate finish per ASTM B545, and includes a blue nylon sleeve for insulation. Key technical specifications include a maximum operating temperature of 105°C, voltage rating of 500 V maximum, and a circular mil area of 2.15 mm² [4234] for 14 AWG wire. The terminal has a tongue material thickness of 0.79±0.05 mm [0.031±0.002 inches] and is designed to accommodate wire insulation diameters of 1.98–3.30 mm [0.078–0.130 inches] for 14 AWG. This terminal is commonly used in electrical and automotive wiring applications where reliable ring connections to studs or posts are required, offering excellent conductivity and corrosion resistance through its tin-plated copper construction.