57.504.9255.0 is a ground block terminal with screw connection for DIN rail mounting, type WK 4 SL/U, manufactured by Wieland Electric. It accommodates fine stranded wire from 0.5–4 mm² or solid wire from 0.5–6 mm² (AWG 22–10), with a wire strip length of 6 mm for fine stranded and 9 mm for solid conductors. The block is rated for 800 V/8 kV/3 kV impulse voltage and carries a current rating of 20 A at 600 V (UL/CSA), meeting EN 60 947-7-2 and DIN VDE 0611 T3 standards. This ground block is commonly used in industrial control panels, power distribution systems, and junction boxes where reliable grounding and safe electrical connections are essential, offering superior design and quality typical of Wieland's interconnect solutions.