The RB657 is a vinyl-insulated fork terminal for wire range #18 - #14 AWG. Fork terminals enable easy installation because the mounting screw does not have to be completely removed. Length .97 inches, .31 inches width, maximum insulation .170 inches, bolt hole #8. The terminal is high-conductivity electrolytic copper, electro-tin plated, with color-coded insulation. Vinyl-insulated fork terminals have extra-long PVC insulation sleeves for protection and stress relief at the wire’s flex point. Recommended tool ERG4001.