Abiko A 2553 R — pre-insulated compression (crimp) copper ring terminal for terminating a 2.5 mm² conductor onto an M5 stud. The barrel is tin-plated electrolytic copper with a brazed neck. The closed ring tongue seats under a screw or nut for a bolted stud connection. The insulation is halogen-free nylon (PA) with an easy-entry conductor funnel and is colour-coded blue for the 1.5-2.5 mm² conductor range. Accepts stranded (IEC 60228 Class 2) and flexible (Class 5) copper conductors; crimped with matching Abiko/Elpress dies to a gas-tight connection. Operating temperature -20 °C to +105 °C; insulation UL-approved; terminal to DIN 46237. Applied in control panels, switchboards, motor terminations and marine and offshore installations.