120051, Flange, Del Seal, Conflat Flange, DN40CF, 69.3mm (2.75"), Blank, Tapped, Rotatable,304ss

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Weight 1.000000

MDC 304 stainless steel bell jars are designed for use with MDC flat baseplates, base wells and feedthrough collars. A dovetail groove in the jar’s base flange holds a Viton® elastomer o-ring gasket, which makes the vacuum seal with a baseplate or one of the  components previously listed. All stainless steel bell jars are fitted with a four-inch view diameter PVP-4 Pyrex® viewport. All vacuum welds are internal and provide UHV compatibility. For added convenience, all bell jars are fitted with a hoist or single top-center lift-ring that is welded to the chamber’s domed top. These chambers can be purchased with an optional electropolished finish.


  • Viton® Gasket Seal
  • Pyrex® Viewport PVP-4


  • Flanges                304ss (1.430I) or 316EFR (1.4429 ESU)  
  • Gaskets               OFE copper 
  • Bolts                    300 stainless steel (ss) and 300ss silver-plated 



  • Bolt Type              Hexagonal or 12-point head 
  • Nut Type               Hexagonal or two-hole plate nuts 
  • Size                       .250-28 UNF or M6 
  • Torque                  12 lb-ft or 16 Nm 


Vacuum range                1x10-13 Torr or below 10-13 mbar 


Temperature range        -200°C to 450°C 


Weight                               0.34 kg | .75 lb


Dimensions                        69.mm | 2.73 inches 

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