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Flanges & Components > CF Flanges & Components > Standard Flanges (304L SS)

1-1/3" O.D. CF Flanges

The CF (ConFlat) flange is the most widely used for high vacuum and UHV applications. Many gauges, instruments, accessories and feedthroughs are available on this flange system.

The seal mechanism is a knife-edge that is machined below flange's flat surface. As the bolts of a flange-pair are tightened, the knifeedges make annular grooves on each side of a soft metal gasket. The extruded metal fills all the machining marks and surface defects in the flange, yielding a leak-tight seal. The CF seal operates from 760 torr (1013 mbar) to <1 x 10-13 torr (<1.3 x 10-13 mbar), and within the temperature range -196° C to 450° C (depending on material). Flange sizes in North America are determined by outside diameter (O.D.). In Europe and much of Asia, the internal diameter (I.D.)—actually the nominal I.D. of the largest tube that can be welded to a bored flange—is used.

ConFlat flanges are offered in four versions— all relating to the bolt holes.

  • Fixed flange: once welded to a fitting, it has its bolt-hole orientation fixed with respect to that fitting.
  • Rotatable flange: when welded to a fitting, it enable the bolt-hole ring to rotate.
  • Through-hole flange: indicates a mating flange-pair accepts bolts that go through both flanges and is secured by nuts or plate nuts.
  • Tapped flange: connected to a through-hole flange using only bolts. Vacuum components with a rough axis of symmetry—e.g., a gate valve—can have fixed CF flanges welded with the bolt holes either split by the axis or in-line with the axis.

Dimensional Drawings


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Ordering Table

(Click column headers to sort data)
Fig. Flange
Type
Bore Dim
A
Dim
B
Dim
C
Dim
D
Dim
E
Dim
F
Bolt
Holes
Bolt Hole
Diam.
Thread
Size
Weight
lbs
Manual PartNo Price Add Item
VacuCADSM
1 Fixed Blank n/a 0.3 n/a 1.06 n/a n/a 6 0.17 n/a 0.25
--
F0133X000N $12.90
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4 Fixed Blank n/a 0.3 0.5 1.06 0.06 0.67 6 0.17 n/a 0.25
--
F0133X000NW $12.90
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2 Fixed 0.26 n/a 0.3 n/a 1.06 n/a n/a 6 0.17 n/a 0.25
--
F0133X025N $12.90
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2 Fixed 0.38 n/a 0.3 n/a 1.06 n/a n/a 6 0.17 n/a 0.25
--
F0133X037N $12.90
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2 Fixed 0.51 n/a 0.3 n/a 1.06 n/a n/a 6 0.17 n/a 0.25
--
F0133X050N $12.90
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3* Fixed 0.63 0.76 0.3 0.18 1.06 n/a n/a 6 0.17 n/a 0.25
--
F0133X075N $12.90
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5 Fixed 0.63 n/a 0.3 0.5 1.06 0.06 0.67 6 0.17 n/a 0.25
--
F0133X075NW $12.90
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1 Fixed Tapped Blank n/a 0.3 n/a 1.06 n/a n/a 6 n/a n/a 0.25
--
F0133X000NT $17.00
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4 Fixed Tapped Blank n/a 0.3 0.5 1.06 0.06 0.67 6 n/a 8/32 0.25
--
F0133X000NTW $18.00
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2 Fixed Tapped 0.26 n/a 0.3 n/a 1.06 n/a n/a 6 n/a 8/32 0.25
--
F0133X025NT $17.00
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2 Fixed Tapped 0.38 n/a 0.3 n/a 1.06 n/a n/a 6 n/a 8/32 0.25
--
F0133X037NT $17.00
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2 Fixed Tapped 0.51 n/a 0.3 n/a 1.06 n/a n/a 6 n/a 8/32 0.25
--
F0133X050NT $17.00
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3* Fixed Tapped 0.63 0.76 0.3 0.18 1.06 n/a n/a 6 n/a 8/32 0.25
--
F0133X075NT $17.00
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5 Fixed Tapped 0.63 n/a 0.3 0.5 1.06 0.06 n/a 6 n/a 8/32 0.25
--
F0133X075NTW $17.00
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6 Rotatable Blank n/a 0.3 n/a 1.06 n/a n/a 6 0.17 n/a 0.25
--
F0133X000R $14.00
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9 Rotatable Blank n/a 0.3 0.5 1.06 0.06 0.67 6 0.17 n/a 0.25
--
F0133X000RW $14.50
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7 Rotatable 0.26 n/a 0.3 n/a 1.06 n/a n/a 6 0.17 n/a 0.25
--
F0133X025R $14.00
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7 Rotatable 0.38 n/a 0.3 n/a 1.06 n/a n/a 6 0.17 n/a 0.25
--
F0133X037R $14.00
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7 Rotatable 0.51 n/a 0.3 n/a 1.06 n/a n/a 6 0.17 n/a 0.25
--
F0133X050R $14.00
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8* Rotatable 0.63 0.76 0.3 0.18 1.06 n/a n/a 6 0.17 n/a 0.25
--
F0133X075R $14.00
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10 Rotatable 0.63 n/a 0.3 0.5 1.06 0.06 0.67 6 0.17 n/a 0.25
--
F0133X075RW $14.00
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6 Rotatable Tapped Blank n/a 0.3 n/a 1.06 n/a n/a 6 n/a 8/32 0.25
--
F0133X000RT $18.10
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9 Rotatable Tapped Blank n/a 0.3 0.5 1.06 0.06 0.67 6 n/a 8/32 0.25
--
F0133X000RTW $18.60
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7 Rotatable Tapped 0.26 n/a 0.3 n/a 1.06 n/a n/a 6 n/a 8/32 0.25
--
F0133X025RT $18.10
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7 Rotatable Tapped 0.38 n/a 0.3 n/a 1.06 n/a n/a 6 n/a 8/32 0.25
--
F0133X037RT $18.10
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7 Rotatable Tapped 0.51 n/a 0.3 n/a 1.06 n/a n/a 6 n/a 8/32 0.25
--
F0133X050RT $18.10
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8* Rotatable Tapped 0.63 0.76 0.3 0.18 1.06 n/a n/a 6 n/a 8/32 0.25
--
F0133X075RT $18.10
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10 Rotatable Tapped 0.63 n/a 0.3 0.5 1.06 0.06 0.67 6 n/a 8/32 0.25
--
F0133X075RTW $18.10
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Accessories Table

Accessories Table

Description For Per Package Weight lbs (kg) Manual PartNo Price Add Item
VacuCADSM
Flange Cap
All 1-1/3" (DN16CF) Flanges
1
1/4 (0.11)
--
F0133CAP $1.05
N/A
1/4 Hard
OFHC Copper Gasket
All 1-1/3" (DN16CF) Flanges
10
1/4 (0.11)
--
GA-0133 $20.20
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Silver-Plated Copper Gasket
All 1-1/3" (DN16CF) Flanges
1
1/4 (0.11)
--
GA-0133NSP $4.20
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Fluorocarbon Gasket (Flat)
All 1-1/3" (DN16CF) Flanges
1
1/4 (0.11)
--
GA-0133V $2.50
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8—32 x 3/4"
Plate Nut & Bolt Set
1-1/3" (DN16CF)
Through-hole CF Flanges
12
1/4 (0.11)
--
PNB-0133 $35.00
N/A
8—32 x 1/2" (Skt Hd)
Bolt Kits
1-1/3" (DN16CF)
Tapped CF Flanges
25
1/4 (0.11)
--
SBK832050 $13.00
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8—32 x 3/4" (Skt Hd)
Bolt & Nut Set
1-1/3" (DN16CF)
Through-hole CF Flanges
25
1/4 (0.11)
--
SBS832075 $34.00
N/A
Gasket Clips for CF Flanges
All 1-1/3" (DN16CF) Flanges
10
1/4 (0.11)
Download PDF
VGC0275S $55.81
N/A
Annealed Copper Gasket
All 1-1/3" (DN16CF) Flanges
5
1/4 (0.11)
--
VZCUA19 $14.50
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Gasket Removal Tool
All 1-1/3" (DN16CF) Flanges
1
1/4 (0.11)
--
VZGRT $36.20
N/A
1 oz. Tube
Anti-Seize Thread Lube
All 1-1/3" (DN16CF) Flanges
1
1/4 (0.11)
--
VZTL $13.35
N/A
Fluorocarbon Gasket (Molded)
All 1-1/3" (DN16CF) Flanges
2
1/4 (0.11)
--
VZVIT19 $24.00
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