The part is a pneumatic connector manufactured by Festo, identified as the L-piece 3558 G-M5-A/I. It features an internal M5 thread and an external M5 thread, designed for reliable air flow connections. Typically used in pneumatic systems, it provides versatile connectivity options in various industrial applications. https://elecena.pl/product/28246013/festo-3558-l-piece-internal-external-thread-m5-1pc 2025-04-07 https://elecena.pl/product/28246013/festo-3558-l-piece-internal-external-thread-m5-1pc 2026-06-19 https://elecena.pl/product/28246013/festo-3558-l-piece-internal-external-thread-m5-1pc 2026-07-12 https://elecena.pl/product/28246013/festo-3558-l-piece-internal-external-thread-m5-1pc 2026-08-28