The RG9731 is a large ring terminal insulated with high dielectric-strength nylon for aircraft wire size 2AN. These ring terminals have funneled barrel entry, deep internal serrations, and overlapping seams. Length 2.07 inches, .69 inches width, maximum insulation .453 inches, bolt hole 3/8 inches. The terminal is high-conductivity electrolytic copper, electro-tin plated, with color-coded insulation, rated for 105°C max temperature. Installing tool TBM6S.