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SU-4

SU 1/4 in. Tube Outside Diameter D Union

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SKU: SU-4 Category: Tag:
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Specifications
Inch/Metric Inch
Tube Outside Diameter D 1/4in, mm
Width Across Flats h 1/2in
Dimensions
SU-4
Dimension A 15.24mm
Dimension B 17.78mm
Dimension I 26.16mm
Dimension L 40.89mm
Dimension d [Min] 4.82mm
Description

(SU-4)

1/4" Stainless Steel Tube Union – Sanitary Compression Fitting

The SU-4 tube union is a 1/4" stainless steel compression fitting designed for high-purity applications in hygienic fluid processors, sanitary, and industrial systems. Made from 316 stainless steel, this sanitary stainless steel fitting uses corrosion-resistant alloys to provide a secure, leak-tight connection, supporting clean in place instrumentation, hygienic valves, and precise fluid control.

  • Material: 316 Stainless Steel (Corrosion-Resistant Alloy)
  • Connection Type: 1/4" Tube OD x 1/4" Tube OD
  • Applications: Sanitary tubing, CIP systems, hygienic valves, lab skids, OEM fluid panels

This 1/4 union fitting—also referred to as a 1/4 union connector, Swagelok stainless steel union alternative (Swagelok equivalent: SS-400-6), or 1/4 tubing union—ensures precise fluid control in biotech, food and beverage, and pharmaceutical systems.

Its corrosion-resistant alloys resist corrosion and support frequent maintenance cycles, making it ideal for hygienic fluid processors. The SU-4 is a reliable choice for engineers specifying components for sanitary systems, offering easy installation and long-term integrity. Whether you’re building lab skids or upgrading industrial piping, this union delivers sanitary performance and durability.

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