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CF Fittings

CF Vacuum Fittings on this site comply with the ISO 3669 standard and CF Vacuum Fittings up to NW200 are compatible with ConFlat flanges and CF flanges from other leading manufacturers.

While there is no general standard for CF flanges NW250 and over, essentially two “standards” have come into use, one Anglo-American and one European, both of which are available in our product line. Other standards are also used by some other manufacturers and in use at some research centres.

Due to UHV bakeability requirements, sealing of the CF flanges is provided by use of Oxygen-free copper (OFHC) flat gasket rings which usually can only be used once due to deformation. The tightening pressure is exerted by through-bore screws that have to be tightened uniformly and crosswise to avoid excessive strain.

Material: 304L stainless steel as standard, 316L and other materials can be supplied upon request
Bakeable to 450°C
Vacuum rating 1×10-11mbar
Wide ranges of elbows, crosses, tees and adaptors are available
Tubulated flanges are available for welding to stainless steel tube

CF250 Fixed Blank Flange SKU: F250 CF Blank flanges are used to cap off the open ports where not required and are also used as a base part to manufacture adaptor fittings, instruments, feedthroughs etc.Manufactured from: 304L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap.The CF Blank flanges are manufactured to the CF Standard and are compatible with other supplier’s product.Material: Stainless SteelBakeable to 450°CVacuum rating 1×10-11 mbarWide range of elbows, crosses, tees and adaptors are availableTubulated flanges are available for welding to stainless steel tube * European standard, to be used with copper gasket OD 272.7 mm £ 376.50 376.5 GBP	CF250 Fixed Bored Flange, 305mm OD 254mm ID SKU: F250B CF Bored Flanges Fixed are used for welding onto tube to produce ports and connectors when manufacturing fabrications. Manufactured from: 304L and 316L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. CF Bored Flanges Fixed are manufactured to the CF Standard and are compatible with other supplier’s product.Material: 304L Stainless SteelBakeable to 450°CVacuum rating 1×10-11 mbarWide range of elbows, crosses, tees and adaptors are availableTubulated flanges are available for welding to stainless steel tube* European standard, to be used with copper gasket OD 272.7 mm £ 379.50 379.5 GBP	CF250 - Bored Tapped Flange, 254mm ID SKU: F250BT CF Bored Flanges Fixed are used for welding onto tube to produce ports and connectors when manufacturing fabrications. Manufactured from: 304L and 316L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. CF Bored Flanges Fixed are manufactured to the CF Standard and are compatible with other supplier’s product.Material: 304L Stainless SteelBakeable to 450°CVacuum rating 1×10-11 mbarWide range of elbows, crosses, tees and adaptors are availableTubulated flanges are available for welding to stainless steel tube* European standard, to be used with copper gasket OD 272.7 mm	CF250 - Plastic CF Flange Cap SKU: F250CAP CF Flange caps are used to protect the knife edge face on CF Flanges. Manufactured from: Plastic £ 3.70 3.7 GBP
CF250 Nut, Bolt and Washers SKU: F250NBWS CF Nut Bolt & Washers with Silver Plated Bolts are used to Clamp two flanges together and compress them against the copper gasket creating a vacuum seal for applications involving Baking. The Silver Plating allows for easy disassembly after BakingManufactured from: Stainless Steel. And Silver Plating CF Nut Bolt & Washer (Silver Plated Bolts) sets are supplied in sealed plastic bags.CF Nuts, Bolts & Washers (Silver Plated Bolts) are manufactured to the ISO standard and are compatible with other supplier’s products £ 38.06 38.06 GBP	CF250 Rotatable Blank CF Flange SKU: F250R CF Rotatable Blank Flanges are used to cap off the open ports where not required and are also used as a base part to manufacture adaptor fittings, instruments, feedthroughs etc.Manufactured from: 304L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap.CF Rotatable Blank Flanges are manufactured to the CF Standard and are compatible with other supplier’s product.Material: 304L stainless steel as standard, 316L and other materials can be suppliedBakeable to 450°CVacuum rating 1×10-11 mbarWide range of elbows, crosses, tees and adaptors are availableTubulated flanges are available for welding to stainless steel tube * European standard, to be used with copper gasket OD 272.7 mm	CF250 Rotatable Bored CF Flange, 305mm OD 256mm ID SKU: F250RB CF Bored Flanges Rotatable are used for welding onto tube to produce ports and connectors when mating with fabrications with the bolt holes in different alignments. Manufactured from: 304L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. Rotatable CF Bored Flanges are manufactured to the CF Standard and are compatible with other supplier’s product Material: 304L Stainless Steel Bakeable to 450°C Vacuum rating 1×10-11 mbar Wide range of elbows, crosses, tees and adaptors are available Tubulated flanges are available for welding to stainless steel tube   * European standard, to be used with copper gasket OD 272.7 mm £ 375.50 375.5 GBP	CF250 Bored Rotatable Tapped Flange, 254mm ID SKU: F250RBT CF Bored Flanges Rotatable are used for welding onto tube to produce ports and connectors when mating with fabrications with the bolt holes in different alignments. Manufactured from: 304L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. Rotatable CF Bored Flanges are manufactured to the CF Standard and are compatible with other supplier’s product Material: 304L Stainless Steel Bakeable to 450°C Vacuum rating 1×10-11 mbar Wide range of elbows, crosses, tees and adaptors are available Tubulated flanges are available for welding to stainless steel tube   * European standard, to be used with copper gasket OD 272.7 mm
CF250 Blank Rotatable Tapped Flange SKU: F250RT CF Rotatable Blank Flanges are used to cap off the open ports where not required and are also used as a base part to manufacture adaptor fittings, instruments, feedthroughs etc.Manufactured from: 304L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap.CF Rotatable Blank Flanges are manufactured to the CF Standard and are compatible with other supplier’s product.Material: 304L stainless steel as standard, 316L and other materials can be suppliedBakeable to 450°CVacuum rating 1×10-11 mbarWide range of elbows, crosses, tees and adaptors are availableTubulated flanges are available for welding to stainless steel tube * European standard, to be used with copper gasket OD 272.7 mm	CF250 Blank Tapped Flange SKU: F250T CF Blank flanges are used to cap off the open ports where not required and are also used as a base part to manufacture adaptor fittings, instruments, feedthroughs etc.Manufactured from: 304L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap.The CF Blank flanges are manufactured to the CF Standard and are compatible with other supplier’s product.Material: Stainless SteelBakeable to 450°CVacuum rating 1×10-11 mbarWide range of elbows, crosses, tees and adaptors are availableTubulated flanges are available for welding to stainless steel tube * European standard, to be used with copper gasket OD 272.7 mm	CF250 Nut, Bolt and Washers SKU: F250TBWS CF Nut Bolt & Washers with Silver Plated Bolts are used to Clamp two flanges together and compress them against the copper gasket creating a vacuum seal for applications involving Baking. The Silver Plating allows for easy disassembly after BakingManufactured from: Stainless Steel. And Silver Plating CF Nut Bolt & Washer (Silver Plated Bolts) sets are supplied in sealed plastic bags.CF Nuts, Bolts & Washers (Silver Plated Bolts) are manufactured to the ISO standard and are compatible with other supplier’s products £ 30.86 30.86 GBP	CF35 Fixed Blank Flange SKU: F35 CF Blank flanges are used to cap off the open ports where not required and are also used as a base part to manufacture adaptor fittings, instruments, feedthroughs etc. Manufactured from: 304L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. The CF Blank flanges are manufactured to the CF Standard and are compatible with other supplier’s product. Material: Stainless Steel Bakeable to 450°C Vacuum rating 1×10-11 mbar Wide range of elbows, crosses, tees and adaptors are available Tubulated flanges are available for welding to stainless steel tube   * European standard, to be used with copper gasket OD 272.7 mm £ 16.14 16.14 GBP
CF35 Fixed Bored Flange, 70mm OD 38mm ID SKU: F35B38 CF Bored Flanges Fixed are used for welding onto tube to produce ports and connectors when manufacturing fabrications. Manufactured from: 304L and 316L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. CF Bored Flanges Fixed are manufactured to the CF Standard and are compatible with other supplier’s product. Material: 304L Stainless Steel Bakeable to 450°C Vacuum rating 1×10-11 mbar Wide range of elbows, crosses, tees and adaptors are available Tubulated flanges are available for welding to stainless steel tube * European standard, to be used with copper gasket OD 272.7 mm £ 10.50 10.5 GBP	CF35 - Bored Tapped Flange, 38mm ID SKU: F35B38T CF Bored Flanges Fixed are used for welding onto tube to produce ports and connectors when manufacturing fabrications. Manufactured from: 304L and 316L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. CF Bored Flanges Fixed are manufactured to the CF Standard and are compatible with other supplier’s product. Material: 304L Stainless Steel Bakeable to 450°C Vacuum rating 1×10-11 mbar Wide range of elbows, crosses, tees and adaptors are available Tubulated flanges are available for welding to stainless steel tube * European standard, to be used with copper gasket OD 272.7 mm £ 13.50 13.5 GBP	CF35 Fixed Bored CF Flange, 70mm OD 41mm ID SKU: F35B41 CF Bored Flanges Fixed are used for welding onto tube to produce ports and connectors when manufacturing fabrications. Manufactured from: 304L and 316L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. CF Bored Flanges Fixed are manufactured to the CF Standard and are compatible with other supplier’s product. Material: 304L Stainless Steel Bakeable to 450°C Vacuum rating 1×10-11 mbar Wide range of elbows, crosses, tees and adaptors are available Tubulated flanges are available for welding to stainless steel tube PLEASE NOTE: Before adding to quote, please select tapped or un-tapped bolt holes from the drop down menu. * European standard, to be used with copper gasket OD 272.7 mm £ 11.99 11.99 GBP	CF35 - Bored Tapped Flange, 41mm ID SKU: F35B41T CF Bored Flanges Fixed are used for welding onto tube to produce ports and connectors when manufacturing fabrications. Manufactured from: 304L and 316L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. CF Bored Flanges Fixed are manufactured to the CF Standard and are compatible with other supplier’s product. Material: 304L Stainless Steel Bakeable to 450°C Vacuum rating 1×10-11 mbar Wide range of elbows, crosses, tees and adaptors are available Tubulated flanges are available for welding to stainless steel tube PLEASE NOTE: Before adding to quote, please select tapped or un-tapped bolt holes from the drop down menu. * European standard, to be used with copper gasket OD 272.7 mm £ 15.25 15.25 GBP
CF35 Fixed Bored CF Flange, 70mm OD 45mm ID SKU: F35B45 CF Bored Flanges Fixed are used for welding onto tube to produce ports and connectors when manufacturing fabrications. Manufactured from: 304L and 316L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. CF Bored Flanges Fixed are manufactured to the CF Standard and are compatible with other supplier’s product. Material: 304L Stainless Steel Bakeable to 450°C Vacuum rating 1×10-11 mbar Wide range of elbows, crosses, tees and adaptors are available Tubulated flanges are available for welding to stainless steel tube * European standard, to be used with copper gasket OD 272.7 mm £ 11.99 11.99 GBP	CF35 - Bored Tapped Flange, 45mm SKU: F35B45T CF Bored Flanges Fixed are used for welding onto tube to produce ports and connectors when manufacturing fabrications. Manufactured from: 304L and 316L Stainless Steel. They are supplied in a plastic bag with a protective plastic cap. CF Bored Flanges Fixed are manufactured to the CF Standard and are compatible with other supplier’s product.Material: 304L Stainless SteelBakeable to 450°CVacuum rating 1×10-11 mbarWide range of elbows, crosses, tees and adaptors are availableTubulated flanges are available for welding to stainless steel tube* European standard, to be used with copper gasket OD 272.7 mm £ 15.25 15.25 GBP	CF35 - Plastic CF Flange Cap SKU: F35CAP CF Flange caps are used to protect the knife edge face on CF Flanges. Manufactured from: Plastic £ 0.75 0.75 GBP	CF35 Nut, Bolt and Washers SKU: F35NBWS CF Nut Bolt & Washers with Silver Plated Bolts are used to Clamp two flanges together and compress them against the copper gasket creating a vacuum seal for applications involving Baking. The Silver Plating allows for easy disassembly after BakingManufactured from: Stainless Steel. And Silver Plating CF Nut Bolt & Washer (Silver Plated Bolts) sets are supplied in sealed plastic bags.CF Nuts, Bolts & Washers (Silver Plated Bolts) are manufactured to the ISO standard and are compatible with other supplier’s products £ 3.00 3.0 GBP