Flange, 4.5" x 2.5" (114mm x 63.8mm) Rotatable, Clearance, 304ss

Availability : 6 weeks
This is our estimated shipping timeline.

This product is currently on back order. Orders are still accepted, but the requested qty will be back ordered.


  • Complies with ISO 3669

  • UHV rated to 1x10-13 Torr mbar

  • High temperature rated to 450°C

  • Rotatable and non-rotatable geometries

  • OFE Copper or optional Viton® elastomer gaskets

  • Tapped or clearance bolt holes

  • Compatible with other manufacturers' Conflat® knife-edge flanges



  • Flanges               304ss (1.4301) or 316EFR (1.4429 ESU)

  • Gaskets                OFE Copper

  • Bolts                  300 stainless steel and 300ss silver Plated


  • Bolt type              Hexagonal or 12-point head

  • Nut type              Hexagonal or two-hole plate nuts

  • Size                  .312-24 UNF or M8

  • Torque                  15 lb-ft or 20 Nm

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

Temperature Range            -2000C to 4500C

Weight                      3lb or 1.4kg maximum

Dimensions                    4.47” OD x 2.51” ID; 113.5mm OD x 66mm ID maximum

More Information

More Information
Weight 0.500000
Bolt Hole Diameter 0.332 inch
Material 304SS (1.4301 | UNS S30400) Stainless Steel
Number of Bolt Holes 8
Bolt Hole Type Clearance
Flange Geometry Rotatable
Flange Size 4.5" (4 1/2") | DN63CF 114mm
Flange Type Del-Seal CF ConFlat
100021_fr_dwg (5.98 kB)
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100021.stp (117.15 kB)
Flange, 4.5" x 2.5" (114mm x 63.8mm) Rotatable, Clearance, 304ss
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