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Zero- Length Reducer 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 ISO3669-2017, but more importantly are compliant to the stricter requirements of ASTM E2934-10.

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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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 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 +1 412 387 9200 or email international@lesker.com with your inquiry.

Accessories Table

Description For Per Package Manual
VacuCADSM
Part Number Price In Stock Add Item
Description For Per Package Manual
VacuCADSM
Part Number Price In Stock Add Item
1/4 Hard OFHC Copper Gasket All 1-1/3" (DN16CF) Flanges 10 --
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GA-0133
$21.05 In Stock
1/4 Hard OFHC Copper Gasket All 2-1/8" (DN25CF) Flanges 10 --
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GA-0212
$24.05 In Stock
1/4 Hard OFHC Copper Gasket All 2-3/4" (DN35-DN40CF) Flanges 10 --
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GA-0275
$27.35 In Stock
1/4 Hard, 1.53" I.D.* OFHC Copper Gasket All 2-3/4" (DN35-DN40CF) Flanges 10 --
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GA-0275LB
$27.35 In Stock
1/4 Hard OFHC Copper Gasket All 3-3/8" (DN50CF) Flanges 10 --
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GA-0337
$31.10 In Stock
1/4 Hard OFHC Copper Gasket All 4-1/2" (DN63CF) Flanges 10 --
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GA-0450
$37.20 In Stock
1/4 Hard OFHC Copper Gasket All 4-5/8" (DN75CF) Flanges 10 --
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GA-0462
$44.25 In Stock
1/4 Hard OFHC Copper Gasket All 6" (DN100CF) Flanges 10 --
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GA-0600
$55.30 In Stock
1/4 Hard OFHC Copper Gasket All 6-3/4" (DN125CF) Flanges 10 --
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GA-0675
$66.35 In Stock
1/4 Hard OFHC Copper Gasket All 8" (DN160CF) Flanges 10 --
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GA-0800
$78.40 In Stock
1/4 Hard OFHC Copper Gasket All 10" (DN200CF) Flanges 10 --
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GA-1000
$96.50 In Stock
1/4 Hard OFHC Copper Gasket All 12"(DN250) CF Flanges 1 --
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GA-1200
$61.35 In Stock
1/4 Hard OFHC Copper Gasket All 13-1/4" CF Flanges 1 --
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GA-1325
$54.30 In Stock
1/4"—28 x 7/8" Reducer Bolt Set 2-1/8" (DN25CF) Smaller CF Flange 25 --
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HBK25028088
$15.60 In Stock
1/4"—28 x 7/8" Reducer Bolt Set 2-3/4" (DN35-DN40CF) Smaller CF Flange 25 --
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HBK25028088
$15.60 In Stock
5/16"—24 x 1-1/4" Reducer Bolt Set 3-3/8" (DN50CF) Smaller CF Flange 25 --
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HBK31224125
$31.10 In Stock
5/16"—24 x 1-1/4" Reducer Bolt Set 4-1/2" (DN63CF) Smaller CF Flange 25 --
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HBK31224125
$31.10 In Stock
5/16"—24 x 1-1/4" Reducer Bolt Set 4-5/8" (DN75CF) Smaller CF Flange 25 --
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HBK31224125
$31.10 In Stock
5/16"—24 x 1-1/4" Reducer Bolt Set 6" (DN100CF) Smaller CF Flange 25 --
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HBK31224125
$31.10 In Stock
5/16"—24 x 1-1/4" Reducer Bolt Set 8" (DN160CF) Smaller CF Flange 25 --
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HBK31224125
$31.10 In Stock
5/16"—24 x 1-1/4" Reducer Bolt Set 10" (DN200CF) Smaller CF Flange 25 --
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HBK31224125
$31.10 In Stock
1/4—28 x 1-3/8" Reducer Bolt Set 2-3/4" (DN35-DN40CF) Larger CF Flange 25 --
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HBS25028138
$30.50 In Stock
5/16"—24 x 1-3/4" Reducer Bolt Set 3-3/8" (DN50CF) Larger CF Flange 25 --
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HBS31224175
$39.20 In Stock
5/16"—24 x 2" Reducer Bolt Set 4-1/2" (DN63CF) Larger CF Flange 25 --
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HBS31224200
$33.20 In Stock
5/16"—24 x 2" Reducer Bolt Set 4-5/8" (DN75CF) Larger CF Flange 25 --
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HBS31224200
$33.20 In Stock
5/16"—24 x 2-1/4" Reducer Bolt Set 6" (DN100CF) Larger CF Flange 25 --
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HBS31224225
$39.20 In Stock
5/16"—24 x 2-1/4" Reducer Bolt Set 6-3/4" (DN125CF) Larger CF Flange 25 --
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HBS31224225
$39.20 In Stock
5/16"—24 x 2-1/4" Reducer Bolt Set 8" (DN160CF) Larger CF Flange 25 --
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HBS31224225
$39.20 In Stock
5/16"—24 x 2-1/2" Reducer Bolt Set 10" (DN200CF) Larger CF Flange 32 --
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HBS31224250
$30.05 Call for Availability
5/16—24 x 3" Reducer Bolt Set 13-1/4" Larger CF Flange 25 --
N/A
HBS31224300
$50.25 In Stock
5/16—24 x 2-1/2" Bolt & Nut Set 12"(DN250) Through-hole CF Flanges 32 --
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HBT31224250
$43.25 In Stock
#8—32 x 1/2" Reducer Bolt Set 1-1/3" (DN16CF) Smaller CF Flange 25 --
N/A
SBK832050S4-25
$13.50 In Stock
5/16-24 x 2 14" Twelve Point Reducer Bolt Set 6" (DN100CF) Larger CF Flange 25 --
N/A
TBS31224225
$41.25 In Stock
Gasket Clips for CF Flanges All CF Flanges 10 Download PDF
N/A
VGC0275S
P.O.R. In Stock
Gasket Removal Tool All CF Flanges 1 --
N/A
VZGRT
$38.20 In Stock
4 oz. Tube Anti-Seize Thread Lube All CF Flanges 1 --
N/A
VZTL-4OZ
P.O.R. In Stock