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Flanges & Components > KF (QF) Flanges & Components > KF (QF) Blank Flanges & Stubs

Blank KF (QF) Stubs (Brass)

KF flanges are equal to the flanges known as KF (or Klein Flansche) by the International Standards Organization.

  • KF fittings are used for through or foreline vacuum plumbing and simple HV (10-8 Torr) chambers
  • Elastomeric o-ring limits the connection's temperature range and ultimate vacuum
  • 304L stainless steel fittings work in adverse temperatures and corrosive conditions
  • Aluminum or brass fittings work in more general applications
ISO Standard Our KF Flanges are compatible to the ISO Standard 2861 Specification.

Dimensional Drawings

Got VacuCADSM?
VacuCAD is a free library containing thousands of 2D CAD drawings (in DXF format) and 3D Models (in STP format) for many of our standard vacuum components and chambers. Please Log in

Ordering Table

(Click column headers to sort data)

Flange
Size/OD
Dim
A
Dim
B
Weight
lbs
PartNo Price Add Item
VacuCADSM
Flange
Size/OD
Dim
A
Dim
B
Weight
lbs
PartNo Price Add Item
VacuCADSM
KF10 0.75 0.75 0.25
QF10-050-UB
$11.30
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KF16 0.75 0.75 0.25
QF16-075-UB
$11.30
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KF25 1 0.75 0.25
QF25-100-UB
$13.30
(please log in)
KF40 1.5 1 0.25
QF40-150-UB
$17.60
(please log in)
KF50 2 1 0.5
QF50-200-UB
$25.60
(please log in)
Flange Selection Guide
With a variety of flanges to choose from, the Flange Selection Guide is designed to help you find one to meet your vacuum requirements. Shop Now!
Can't find the flange you need or want a custom configuration? Please call us at 1-412-387-9200 or email international@lesker.com with your inquiry.

Accessories Table

Description For Per Package Weight lbs (kg) Manual PartNo Price Add Item
VacuCADSM
Description For Per Package Weight lbs (kg) Manual PartNo Price Add Item
VacuCADSM
Cast Clamps (Aluminum)
KF10, KF16 Flanges
1
1/2 (0.22)
--
QF16-075-C
P.O.R.
(please log in)
Cast Clamps (Aluminum)
KF25 Flanges
1
1/2 (0.22)
--
QF25-100-C
P.O.R.
(please log in)
Cast Clamps (Aluminum)
KF40 Flanges
1
3/4 (0.34)
--
QF40-150-C
P.O.R.
(please log in)
Cast Clamps (Aluminum)
KF50 Flanges
1
3/4 (0.34)
--
QF50-200-C
P.O.R.
(please log in)
Lever Clamps (Aluminum)
KF10, KF16 Flanges
1
1/2 (0.22)
--
QF16-075-CHA
$33.00
N/A
Lever Clamps (Aluminum)
KF25 Flanges
1
3/4 (0.34)
--
QF25-100-CHA
$46.00
N/A
Lever Clamps (Aluminum)
KF40 Flanges
1
3/4 (0.34)
--
QF40-150-CHA
$54.00
N/A
Centering Ring (Brass with Buna-N O-Ring)
KF10 Flanges
1
1/4 (0.11)
--
QF10-050-BRB
$3.20
(please log in)
Centering Ring (Brass with Buna-N O-Ring)
KF16 Flanges
1
1/4 (0.11)
--
QF16-075-BRB
P.O.R.
(please log in)
Centering Ring (Brass with Buna-N O-Ring)
KF25 Flanges
1
1/4 (0.11)
--
QF25-100-BRB
$4.80
(please log in)
Centering Ring (Brass with Buna-N O-Ring)
KF40 Flanges
1
1/4 (0.11)
--
QF40-150-BRB
$5.90
(please log in)
Centering Ring (Brass with Buna-N O-Ring)
KF50 Flanges
1
1/4 (0.11)
--
QF50-200-BRB
$7.00
(please log in)

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