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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.

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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

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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
VacuCADSM
Part Number Price In Stock Add Item
Description For Per Package
VacuCADSM
Part Number Price In Stock Add Item
Cast Clamps (Aluminum) KF10, KF16 Flanges 1
(please log in)
QF16-075-C
P.O.R. In Stock
Cast Clamps (Aluminum) KF25 Flanges 1
(please log in)
QF25-100-C
P.O.R. In Stock
Cast Clamps (Aluminum) KF40 Flanges 1
(please log in)
QF40-150-C
P.O.R. In Stock
Cast Clamps (Aluminum) KF50 Flanges 1
(please log in)
QF50-200-C
P.O.R. In Stock
Lever Clamps (Aluminum) KF10, KF16 Flanges 1
N/A
QF16-075-CHA
$33.20 In Stock
Lever Clamps (Aluminum) KF25 Flanges 1
N/A
QF25-100-CHA
$46.25 In Stock
Lever Clamps (Aluminum) KF40 Flanges 1
N/A
QF40-150-CHA
$54.72 In Stock