The 321617 is a loose-piece, pre-insulated ring tongue terminal for creating reliable solderless connections. It is designed to accommodate a wire size range of 26-22 AWG and fits a #4 stud. The terminal body and metallic sleeve are made from tin-plated copper, while the yellow insulation is a high-strength nylon (UL 94V-2) that can handle a maximum wire insulation diameter of 2.08 mm. The design includes a funnel entry for easy wire insertion and internal serrations for strong contact and tensile strength, making it suitable for a wide range of commercial and industrial applications.