3.375 inch outer diameter ConFlat non-rotatable flanges ideal for UHV applications.


  • 304L stainless steel


Product Notes:

  • Designed to fit standard inch tubing O.D.’s
  • Self-aligning
  • Internal weld
  • Sexless flanges
  • Tapped and clearance (through-holes) bolt holes available
  • Blank flanges close unused ports or custom modify
  • Interchangeable with other ConFlat style flanges
  • Adapters to other flange systems available
  • Vacuum rated: UHV (approx. 1×10-13 Torr)
  • Temperature range: -200°C up to 450°C
  • Leak rating < 1×10-9 std. cc/s helium


Options: Contact us for price and availability

  • Metric tapped bolt holes
  • Alternative materials: 316L stainless steel, aluminum, etc.


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