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Flanges & Components > ISO Flanges & Components > ISO "F" Flanges (bolted)

ISO-F Blank Flanges (304L SS)

The ISO flange (also called Large ISO) is used for HV chamber ports and is available in two distinct styles; ISO-K which uses clamp fasteners and ISO-F which uses nut and bolt fasteners. A variety of bolt/clamp options permit joints between mixed ISO-K and -F flanges.

The design principles of ISO and KF seals are identical. Each flange face is counter-bored or grooved to receive a metal centering ring with an elastomeric o-ring around its O.D. As with KF, the ISO centering ring both aligns the flanges and holds the o-ring in place.

ISO flanges are limited (by the o-ring's properties) to applications with temperatures between ~0° C and 120–180° C, and pressure from atmosphere to ~10-8 torr or mbar.

NOTE: These flanges are identical to the ISO NW flange standard. While these flanges are compatible with those made by European manufacturers, the tube diameter listed is in inches.

ISO Standard Our ISO-F Flanges are compatible to the ISO Standard 1609 Specification.

Dimensional Drawings

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Ordering Table

(Click column headers to sort data)

Flange
Size/OD
Nominal
Tube OD
Bolt
Holes
Bolt Hole
Diam.
Weight
lbs
PartNo Price Add Item
VacuCADSM
Flange
Size/OD
Nominal
Tube OD
Bolt
Holes
Bolt Hole
Diam.
Weight
lbs
PartNo Price Add Item
VacuCADSM
ISO63 2.5 4 0.35 4
QF63-BF
$89.00
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ISO80 3 8 0.35 4
QF80-BF
$114.00
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ISO100 4 8 0.35 4
QF100-BF
$135.00
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ISO160 6 8 0.43 11
QF160-BF
$245.00
(please log in)
ISO200 8 12 0.43 18
QF200-BF
$306.00
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ISO250 10 12 0.43 25
QF250-BF
$455.00
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ISO320 12.75 12 0.55 50
QF320-BF
$822.00
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ISO400 16 16 0.55 75
QF400-BF
$1,211.00
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ISO500 20 16 0.55 95
QF500-BF
$2,462.00
(please log in)
ISO630 26 20 0.55 130
QF630-BF
P.O.R.
(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
Bolt Kits, M10-35
ISO200 - ISO250 "F" Flanges
12
2 (0.91)
--
HBKM10X35-12
$30.90
(please log in)
Bolt Kits, M10-35
ISO160 "F" Flanges
8
2 (0.91)
--
HBKM10X35-8
$25.80
(please log in)
Bolt Kits, M12-45
ISO320 "F" Flanges
12
2 (0.91)
--
HBKM12X45-12
$30.24
N/A
Bolt Kits, M12-45
ISO400 - ISO500 "F" Flanges
16
4 (1.81)
--
HBKM12X45-16
$47.00
(please log in)
Bolt Kits, M12-55
ISO630 "F" Flanges
20
4 (1.81)
--
HBKM12X55-20
$54.00
(please log in)
Bolt Kits, M8-30
ISO63 "F" Flanges
4
1 (0.45)
--
HBKM8X30-4
$10.60
(please log in)
Bolt Kits, M8-30
ISO80 - ISO100 "F" Flanges
8
1 (0.45)
--
HBKM8X30-8
$7.50
(please log in)
Bolt Sets, M10-50
ISO200 - ISO250 "F" Flanges
12
2 (0.91)
--
HBSM10X50-12
$35.10
(please log in)
Bolt Sets, M10-50
ISO160 "F" Flanges
8
2 (0.91)
--
HBSM10X50-8
$23.50
(please log in)
Bolt Sets, M12-60
ISO320 "F" Flanges
12
2 (0.91)
--
HBSM10X60-12
P.O.R.
N/A
Bolt Sets, M12-60
ISO400 - ISO500 "F" Flanges
16
4 (1.81)
--
HBSM12X60-16
$71.00
(please log in)
Bolt Sets, M12-65
ISO630 "F" Flanges
20
4 (1.81)
--
HBSM12X65-20
$86.00
(please log in)
Bolt Sets, M8-40
ISO63 "F" Flanges
4
1 (0.45)
--
HBSM8X40-4
$6.40
(please log in)
Bolt Sets, M8-40
ISO80 - ISO100 "F" Flanges
8
1 (0.45)
--
HBSM8X40-8
$12.80
(please log in)
Single Clamps Aluminum (M12)
ISO320 - ISO500 "K" & "F" Flanges
1
1/4 (0.11)
--
QF-LSC-ALM
$8.00
N/A
Single Clamps Aluminum (M10)
ISO160 - ISO250 "K" & "F" Flanges
1
1/4 (0.11)
--
QF-MSC-ALM
$5.90
N/A
Single Clamps Aluminum (5/16-18)
ISO63 - ISO100 "K" & "F" Flanges
1
1/4 (0.11)
--
QF-SSC-ALI
$5.40
(please log in)
Single Clamps Aluminum (5/16-18)
ISO160 - ISO250 "K" & "F" Flanges
1
1/4 (0.11)
--
QF-SSC-ALJ
$6.60
(please log in)
Single Clamps Aluminum (7/16-14)
ISO320 - ISO500 "K" & "F" Flanges
1
1/4 (0.11)
--
QF-SSC-ALK
$10.70
(please log in)
Single Clamps Aluminum (M8)
ISO63 - ISO100 "K" & "F" Flanges
1
1/4 (0.11)
--
QF-SSC-ALM
$4.80
N/A
Single Clamps Aluminum (M12)
**ISO630 "K" & "F" Flanges
1
1/4 (0.11)
--
QF-XSC-SLM
$21.30
N/A
Centering Ring (Aluminum with Fluorocarbon O-Ring)
ISO100 "F" Flanges
1
1 (0.45)
--
QF100-AAVR
$35.10
(please log in)
Centering Ring (Aluminum with Fluorocarbon O-Ring)
ISO160 "F" Flanges
1
1 (0.45)
--
QF160-AAVR
$47.00
(please log in)
Centering Ring (Aluminum with Fluorocarbon O-Ring)
ISO200 "F" Flanges
1
1 (0.45)
--
QF200-AAVR
$65.00
(please log in)
Centering Ring (Aluminum with Fluorocarbon O-Ring)
ISO250 "F" Flanges
1
1 (0.45)
--
QF250-AAVR
$83.00
(please log in)
Centering Ring (Aluminum with Fluorocarbon O-Ring)
ISO320 "F" Flanges
1
2 (0.91)
--
QF320-AAVR
$124.00
(please log in)
Centering Ring (Aluminum with Fluorocarbon O-Ring)
ISO400 "F" Flanges
1
2 (0.91)
--
QF400-AAVR
$212.00
(please log in)
Centering Ring (Aluminum with Fluorocarbon O-Ring)
ISO500 "F" Flanges
1
2 (0.91)
--
QF500-AAVR
$330.00
(please log in)
Centering Ring (Aluminum with Fluorocarbon O-Ring)
ISO63 "F" Flanges
1
1 (0.45)
--
QF63-AAVR
$30.90
(please log in)
Centering Ring (Aluminum with Fluorocarbon O-Ring)
ISO630 "F" Flanges
1
3 (1.36)
--
QF630-AAVR
$351.00
(please log in)
Centering Ring (Aluminum with Fluorocarbon O-Ring)
ISO80 "F" Flanges
1
1 (0.45)
--
QF80-AAVR
$35.10
(please log in)

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