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The Thor steel quick-connect air coupling plug is the ideal solution for connecting tools to air, water or fluid lines in heavy-duty industrial and construction applications. Manufactured from high-quality steel, this durable plug offers enhanced damage resistance and a wide working temperature range. The double-lock design provides secure connection with a quarter-turn and click, while the spring-retracting sleeve prevents unintentional disconnection. Designed for versatility, these couplings are compatible with any double-lock socket regardless of barbed hose ID or pipe size. With applications in automotive service and repair, construction vehicles, and drop-down air lines, the Thor steel quick-connect air coupling plug ensures reliable, efficient connections in demanding environments.