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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

CF35 Rotatable Blank CF Flange SKU: F35R 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 supplied 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 £ 14.59 14.59 GBP	CF35 Rotatable Bored CF Flange, 70mm OD 38mm ID SKU: F35R38 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 £ 13.99 13.99 GBP	CF35 Bored Rotatable Tapped Flange, 38mm ID SKU: F35R38T 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 £ 18.95 18.95 GBP	CF35 Rotatable Bored CF Flange, 70mm OD 41mm SKU: F35R41 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 £ 14.99 14.99 GBP
CF35 Bored Rotatable Tapped Flange, 41mm ID SKU: F35R41T 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 productMaterial: 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 £ 21.55 21.55 GBP	CF35 Rotatable Bored CF Flange, 70mm OD 45mm ID SKU: F35R45 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 £ 22.99 22.990000000000002 GBP	CF35 Bored Rotatable Tapped Flange, 45mm ID SKU: F35R45T 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 productMaterial: 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 £ 21.55 21.55 GBP	CF35 Blank Rotatable Tapped Flange SKU: F35RT 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
CF35 Blank Tapped Flange SKU: F35T 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 £ 16.45 16.45 GBP	CF35 Nut, Bolt and Washers SKU: F35TBWS 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 £ 1.94 1.94 GBP	Demountable viewport on a CF35 flange with UV grade fused silica optic SKU: F35VPDF Demountable viewport on a CF35 flange with UV grade fused silica optic Demountable viewport for high vacuum systems allowing users to change optics without having to replace the complete viewport, which saves money, and is very useful if optic damage is likely, for example, in laser applications Constructed from stainless steel 304L (1.4307) with an aluminium alloy retainer Can be installed on standard CF vacuum ports, no special adaptors or fittings needed UHV cleaned and helium leak tested Typical lead time 4-6 weeks Optic materials available: borosilicate glass, sapphire, zinc selenide (ZnSe), magnesium fluoride (MgF2), barium fluoride (BaF2) and calcium fluoride (CaF2). Other materials may be supplied on request. Different sizes available on request. £ 250.00 250.0 GBP	Demountable viewport on a CF35 flange with borosilicate glass (Kodial) optic SKU: F35VPDK Demountable viewport on a CF35 flange with borosilicate glass (Kodial) optic Demountable viewport for high vacuum systems allowing users to change optics without having to replace the complete viewport, which saves money, and is very useful if optic damage is likely, for example, in laser applications Constructed from stainless steel 304L (1.4307) with an aluminium alloy retainer Can be installed on standard CF vacuum ports, no special adaptors or fittings needed UHV cleaned and helium leak tested Typical lead time 4-6 weeks Optic materials available: borosilicate glass, sapphire, zinc selenide (ZnSe), magnesium fluoride (MgF2), barium fluoride (BaF2) and calcium fluoride (CaF2). Other materials may be supplied on request. Different sizes available on request. £ 240.00 240.0 GBP
CF63 Fixed Blank Flange SKU: F63 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 £ 35.95 35.95 GBP	CF63 Fixed Bored CF Flange, 114mm OD 63.5mm ID SKU: F63B63 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 £ 35.50 35.5 GBP	CF63 - BoredTapped Flange, 63.5mm ID SKU: F63B63T 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 £ 45.50 45.5 GBP	CF63 Fixed Bored CF Flange, 114mm OD 70mm ID SKU: F63B70 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 £ 35.50 35.5 GBP
CF63 - Bored Tapped Flange, 70mm ID SKU: F63B70T 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 £ 45.50 45.5 GBP	CF63 - Plastic CF Flange Cap SKU: F63CAP CF Flange caps are used to protect the knife edge face on CF Flanges. Manufactured from: Plastic £ 0.70 0.7000000000000001 GBP	CF63 Nut, Bolt and Washers SKU: F63NBWS 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 £ 7.76 7.76 GBP	CF63 Rotatable Blank CF Flange SKU: F63R 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 £ 42.45 42.45 GBP