The Weldtec 3578G-18 Air-Cooled Dinse Connector 35/50 (1/2") is a durable, high-performance connector designed specifically for air-cooled TIG torch setups. Engineered to provide secure electrical transfer and a stable, low-resistance connection, this Dinse-style twist-lock connector ensures consistent performance in both everyday use and high-demand welding environments.
Ideal for torch lead repairs or custom builds, the 3578G-18 delivers a tight, dependable connection between your TIG torch and power source while maintaining excellent conductivity and long service life. Made in the USA, it’s built to meet the expectations of professional welders who rely on dependable equipment day in and day out.
Works With
26 style air-cooled TIG torches and compatible leads using 35/50 (1/2") Dinse connections.
What’s Included
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1 × 3578G-18 Air-Cooled Dinse Connector
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1 × 18" Gas Hose with Standard Male 5/8 Gas Fitting and Hand Quick-Tighten Nut
Engineered for shops and mobile welders alike, the 3578G-18 provides consistent power transfer, simple gas hookup, and a rugged connection that stands up to repeated installs and removals without loosening or wear.

