Swagelok SS-400-6 Tube Fitting Union One Quarter Inch

Swagelok SS-400-6 is a stainless steel tube fitting union for 1/4 in. outer-diameter tubing. Crafted from 316 stainless steel, it uses Swagelok’s union design to join two 1/4 in. OD tubes with a removable, leak-tight connection that can be disassembled for maintenance without disturbing adjacent components. The assembly employs Swagelok’s standard nut and ferrules to seal both tube ends, delivering corrosion resistance suitable for demanding environments. As a union fitting, it provides a straightforward method to connect or reconfigure tubing runs in instrumentation, chemical processing, pharmaceutical, semiconductor, and petrochemical applications where durability and chemical compatibility are essential. Sold as a four-pack, SS-400-6 is convenient for multi-line installations or stocking spare units in critical systems. Common uses include sample lines, gas and liquid transfer lines, and laboratory or industrial process loops where a robust stainless steel 1/4 in. tube connection is required.