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KF (QF) Centering Rings (Stainless Steel)

These centering rings are used for mating KF flanges and include both the centering ring and o-ring. The KF (QF) flange is used for through- or foreline vacuum plumbing and for simple HV chamber ports.

KF Centering Rings Feature:

  • Rings available in stainless steel, brass, or aluminum
  • Stainless steel and aluminum centering rings available with either fluorocarbon or Buna-N o-rings
  • Brass centering rings available with Buna-N o-rings only

Dimensional Drawings

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To speak with someone directly, please call 1-412-387-9200 or email international@lesker.com.
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Ordering Table

(Click column headers to sort data)

Flange
Size
Dim
A
Dim
B
O-Ring
Mat'l
Weight
lbs
PartNo Price Add Item
VacuCADSM
Flange
Size
Dim
A
Dim
B
O-Ring
Mat'l
Weight
lbs
PartNo Price Add Item
VacuCADSM
KF10 0.37 0.47 Buna-N 0.25
QF10-050-SRB
$5.40
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KF10 0.37 0.47 Fluorocarbon 0.25
QF10-050-SRV
$6.40
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KF16 0.64 0.67 Buna-N 0.25
QF16-075-SRB
$5.40
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KF16 0.64 0.67 Fluorocarbon 0.25
QF16-075-SRV
$6.70
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KF25 0.93 1.03 Buna-N 0.25
QF25-100-SRB
$7.50
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KF25 0.93 1.03 Fluorocarbon 0.25
QF25-100-SRV
$8.50
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KF40 1.51 1.61 Buna-N 0.25
QF40-150-SRB
$11.80
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KF40 1.51 1.61 Fluorocarbon 0.25
QF40-150-SRV
$13.00
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KF50 1.95 2.05 Buna-N 0.25
QF50-200-SRB
$12.80
(please log in)
KF50 1.95 2.05 Fluorocarbon 0.25
QF50-200-SRV
$15.00
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