The basic seal for the CF flange system is an oxygen free electronic grade (OFE) and high thermal conductivity (OFHC) copper gasket that is compressed between the knife-edges of two CF flanges to create a seal capable of achieving ultra high vacuum pressures. Copper gaskets have a temperature range of –200 ̊C up to 450 ̊C. These gaskets are precisely punched, de-burred, chemically treated and packaged to eliminate and prevent surface imperfections. CF copper gaskets provide one reliable seal per use. Use a new copper gasket each time you install a CF sealing assembly.


  • OFE copper

Product Notes:

  • Single-use seal
  • Pressure range: UHV (approx. 1×10-13 Torr)
  • Temperature range: -200°C up to 450°C

*Dimensions are in inches unless otherwise specified

Part IDReference NumberDescription Inner Diameter Outer Diameter Use with Flange 3D CADDrawingUnit PriceIn StockQty, Add To Cart
Part ID0604020Reference NumberCF133-GA-CODescription Copper Gaskets (10)Inner Diameter 0.64Outer Diameter 0.835Use with Flange CF1333D CADLoginDrawingLoginUnit Price$22.001924
Part ID0604022Reference NumberCF212-GA-CODescription Copper Gaskets (10)Inner Diameter 1.01Outer Diameter 1.29Use with Flange CF2123D CADLoginDrawingLoginUnit Price$25.00318
Part ID0604026Reference NumberCF275-175-GA-CODescription Copper Gaskets (10)Inner Diameter 1.53Outer Diameter 1.895Use with Flange CF2753D CADLoginDrawingLoginUnit Price$32.0025
Part ID0604024Reference NumberCF275-GA-CODescription Copper Gaskets (10)Inner Diameter 1.45Outer Diameter 1.895Use with Flange CF2753D CADLoginDrawingLoginUnit Price$28.00682
Part ID0604025Reference NumberCF275-GA-CO-SDDescription Copper Gaskets Solid (10)Inner Diameter SOLIDOuter Diameter 1.895Use with Flange CF2753D CADLoginDrawingLoginUnit Price$35.0081
Part ID0604027Reference NumberCF338-GA-CODescription Copper Gaskets (10)Inner Diameter 2.01Outer Diameter 2.42Use with Flange CF3383D CADLoginDrawingLoginUnit Price$37.0079
Part ID0604029Reference NumberCF450-GA-CODescription Copper Gaskets (10)Inner Diameter 2.505Outer Diameter 3.24Use with Flange CF4503D CADLoginDrawingLoginUnit Price$57.00434
Part ID0604031Reference NumberCF462-GA-CODescription Copper Gaskets (10)Inner Diameter 3.01Outer Diameter 3.6Use with Flange CF4623D CADLoginDrawingLoginUnit Price$60.0012
Part ID0604033Reference NumberCF600-GA-CODescription Copper Gaskets (10)Inner Diameter 4.01Outer Diameter 4.74Use with Flange CF6003D CADLoginDrawingLoginUnit Price$74.50540
Part ID0604035Reference NumberCF675-GA-CODescription Copper Gaskets (10)Inner Diameter 5Outer Diameter 5.56Use with Flange CF6753D CADLoginDrawingLoginUnit Price$79.00Contact
Part ID0604037Reference NumberCF800-GA-CODescription Copper Gaskets (10)Inner Diameter 6.01Outer Diameter 6.74Use with Flange CF8003D CADLoginDrawingLoginUnit Price$88.65281
Part ID0604039Reference NumberCF1000-GA-CODescription Copper Gaskets (10)Inner Diameter 8.01Outer Diameter 8.74Use with Flange CF10003D CADLoginDrawingLoginUnit Price$104.00124
Part ID0604041Reference NumberCF1200-GA-CODescription Copper Gaskets (1)Inner Diameter 10Outer Diameter 10.74Use with Flange CF12003D CADLoginDrawingLoginUnit Price$65.0048
Part ID0604043Reference NumberCF1325-GA-CODescription Copper Gaskets (1)Inner Diameter 10.89Outer Diameter 11.575Use with Flange CF13253D CADLoginDrawingLoginUnit Price$57.00Contact
Part ID0604045Reference NumberCF1400-GA-CODescription Copper Gaskets (1)Inner Diameter 11.8Outer Diameter 12.31Use with Flange CF14003D CADLoginDrawingLoginUnit Price$65.00613
Part ID0604047Reference NumberCF1450-GA-CODescription Copper Gaskets (1)Inner Diameter 12.11Outer Diameter 12.81Use with Flange CF14503D CADLoginDrawingLoginUnit Price$110.0026
Part ID0604049Reference NumberCF1650-GA-CODescription Copper Gaskets (1)Inner Diameter 14.135Outer Diameter 14.81Use with Flange CF16503D CADLoginDrawingLoginUnit Price$75.0018