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Zero- Length Reducer ConFlat® (CF) UHV Flanges (Standard)

Adapt two different-size knife-edge flanges that need to be bolted together.

Reducer Flange Features:

  • All small flanges have blind tapped bolt holes — most large flanges have through-holes (where the two flanges have similar diameters, both are tapped)
  • Part numbers ending with the letter "T" represent double-tapped flanges
ISO Standard KJLC flanges & gaskets are compatible with flanges produced to the ISO3669-2017 & ASTM E2734/E2734M-10 standards.

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+1 800 245 1656
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Ordering Table

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 Notes: 
1.
Due to space constraints, it is recommended to use the Twelve point bolt set (Part: TBS31224225).
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 +1 800 245 1656 or email salesus@lesker.com with your inquiry.

Accessories Table

Description For Per Package Note Manual
VacuCADSM
Part Number Price In Stock Add Item
Description For Per Package Note Manual
VacuCADSM
Part Number Price In Stock Add Item
Gasket, Copper, DN16CF (1.33" OD) Flange , 0.837" OD, 0.640" ID, (10) Per Package All 1-1/3" (DN16CF) Flanges 10
(please log in)
GA-0133View GA-0133 Specific Information
$26.35
In Stock
Gasket, Copper, DN25 (2.125" OD) Flange, 1.291" OD, 1.010" ID, (10) Per Package All 2-1/8" (DN25CF) Flanges 10
(please log in)
GA-0212View GA-0212 Specific Information
$29.05
In Stock
Gasket, Copper, DN35CF-DN40CF (2.75" OD) Flange, 1.895" OD, 1.451" ID, (10) Per Package All 2-3/4" (DN35-DN40CF) Flanges 10
(please log in)
GA-0275View GA-0275 Specific Information
$34.40
In Stock
Gasket, Copper, DN35CF-DN40CF (2.75" OD) Flange, Large Bore, 1.895" OD, 1.528" ID, (10) Per Package All 2-3/4" (DN35-DN40CF) Flanges 10
(please log in)
GA-0275LBView GA-0275LB Specific Information
$34.50
In Stock
Gasket, Copper, DN50CF (3.375" OD) Flange, 2.425" OD, 2.010" ID, (10) Per Package All 3-3/8" (DN50CF) Flanges 10
(please log in)
GA-0337View GA-0337 Specific Information
$37.15
In Stock
Gasket, Copper, DN63CF (4.50" OD) Flange, 3.243" OD, 2.506" ID, (10) Per Package All 4-1/2" (DN63CF) Flanges 10
(please log in)
GA-0450View GA-0450 Specific Information
$58.90
In Stock
Gasket, Copper, DN75CF (4.625" OD) Flange, 3.598" OD x 3.010" ID, (10) Per Package All 4-5/8" (DN75CF) Flanges 10
(please log in)
GA-0462View GA-0462 Specific Information
$60.85
In Stock
Gasket, Copper, DN100CF (6.00" OD) Flange, 4.743" OD,4.006" ID, (10) Per Package All 6" (DN100CF) Flanges 10
(please log in)
GA-0600View GA-0600 Specific Information
$75.80
In Stock
Gasket, Copper, DN125CF (6.75" OD) Flange, 5.567" OD x 5.010" ID, (10) Per Package All 6-3/4" (DN125CF) Flanges 10
(please log in)
GA-0675View GA-0675 Specific Information
$93.50
In Stock
Gasket, Copper, DN160CF (8.00" OD) Flange, 6.743" OD, 6.007" ID, (10) Per Package All 8" (DN160CF) Flanges 10
(please log in)
GA-0800View GA-0800 Specific Information
$105.30
Contact KJLC for Availability
Gasket, Copper, DN200CF (10.00" OD) Flange, 8.743" OD, 8.007" ID, (10) Per Package All 10" (DN200CF) Flanges 10
(please log in)
GA-1000View GA-1000 Specific Information
$131.30
In Stock
Gasket, Copper, DN250CF (12.00" OD) Flange, 10.743" OD x 10.007" ID, (1) Per Package All 12"(DN250) CF Flanges 1
(please log in)
GA-1200View GA-1200 Specific Information
$79.50
In Stock
Gasket, Copper, DN275CF (13.25" OD) Flange, 11.590" OD, 10.845" ID, (1) Per Package All 13-1/4" CF Flanges 1
(please log in)
GA-1325View GA-1325 Specific Information
$69.45
In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 1/4-28 x 1.38" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 2-3/4" (DN35-DN40CF) Larger CF Flange 25
(please log in)
HBS25028138
$30.50
Contact KJLC for Availability
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 1.75" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 3-3/8" (DN50CF) Larger CF Flange 25
(please log in)
HBS31224175
$39.20
In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.00" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 4-1/2" (DN63CF) Larger CF Flange 25
(please log in)
HBS31224200
$33.20
In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.00" Long Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 4-5/8" (DN75CF) Larger CF Flange 25
(please log in)
HBS31224200
$33.20
In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 6" (DN100CF) Larger CF Flange 25
(please log in)
HBS31224225
$39.20
In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 6-3/4" (DN125CF) Larger CF Flange 25
(please log in)
HBS31224225
$39.20
In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 8" (DN160CF) Larger CF Flange 25
(please log in)
HBS31224225
$39.20
In Stock
Hex,bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.50" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 10" (DN200CF) Larger CF Flange 32
(please log in)
HBS31224250
$30.05
Contact KJLC for Availability
Hex Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 3.00" Hex Bolts, (25) Hex Nuts, & (50) Flat Washers 13-1/4" Larger CF Flange 25
N/A
HBS31224300
$50.25
In Stock
Socket Head Cap Screws, Stainless Steel, (25) 8-32 x 0.50" Long Socket Head Cap Screws 1-1/3" (DN16CF) Smaller CF Flange 25 1
N/A
SBK832050S4-25
$13.50
Contact KJLC for Availability
Hex Bolt & Washer Kit, Stainless Steel, (25) 1/4-28 x 0.875" Long Hex Bolts & (25) Flat Washers 2-1/8" (DN25CF) Smaller CF Flange 25
(please log in)
HBK25028088
$15.60
In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 1/4-28 x 0.875" Long Hex Bolts & (25) Flat Washers 2-3/4" (DN35-DN40CF) Smaller CF Flange 25
(please log in)
HBK25028088
$15.60
In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 3-3/8" (DN50CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10
In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 4-1/2" (DN63CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10
In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 4-5/8" (DN75CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10
In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 6" (DN100CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10
In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 8" (DN160CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10
In Stock
Hex Bolt & Washer Kit, Stainless Steel, (25) 5/16-24 x 1.25" Long Hex Bolts & (25) Flat Washers 10" (DN200CF) Smaller CF Flange 25
(please log in)
HBK31224125
$31.10
In Stock
Gasket Removal Tool, For All Conflat (CF) Flange Sizes All CF Flanges 1
N/A
VZGRT
$38.50
In Stock
Thread Lubricant, 4 Ounce Tube All CF Flanges 1
N/A
VZTL-4OZ
$42.00
In Stock
Twelve Pont Bolt, Nut & Washer Set, Stainless Steel, (25) 5/16-24 x 2.25" Long 12-point Bolts, (25) Hex Nuts, & (50) Flat Washers 6" (DN100CF) Larger CF Flange 25 2
N/A
TBS31224225
$55.50
In Stock
Hex Bolt, Nut & Washer Set, Stainless Steel, (32) 5/16-24 x 2.50" Long Hex Bolts, (32) Hex Nuts, & (64) Flat Washers 12"(DN250) Through-hole CF Flanges 32
(please log in)
HBT31224250
$43.25
In Stock
Gasket Clips, For All Conflat (CF) Flange Sizes, (10) Per Package All CF Flanges 10 Download PDF
N/A
VGC0275S
$106.00
In Stock
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 Notes: 
1.
This item is a socket head cap screw, not a hex head bolt.
2.
Due to space constraints, it is recommended to use the Twelve point bolt set (Part: TBS31224225).
How to Combine Click the checkboxes of the parts you would like to purchase and then click the button below to add all parts selected into your Cart.
Contact Us - Zero- Length Reducer ConFlat® (CF) UHV Flanges (Standard)