Specializing in standard, custom, and modified Glass to Metal seals.

ISO Large-Flange Accessories

Larson Electronic Glass offers hardware for ISO Large-Flange and vacuum fittings. Our inventory includes claw-clamp style blank and bored flanges, as well as blank and bored bolt style flanges, stainless steel centering ring assemblies, double claw clamps, bolt sets, and rotatable bolt ring assemblies.


  • SS/Viton® Centering ring assemblies
  • Aluminum Double Claw Clamp
  • ISO M8 Bolt set
  • Replacement Viton® o-rings

Request a quote on the Large-Flange® accessories you need, or contact Larson Electronic Glass to learn more.

Larson Electronic Glass offers hardware for "Large-Flange" flanges from NW63 to NW200

 *Please select the quantity for each item you wish to order and click the 'Add To Quote' button below.
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NW63 Centering Ring SS/Viton  NW63 Centering Ring SS/Viton  913606  65

NW63 Viton O-ring  NW63 Viton O-ring  913706  12

NW63 Double Claw Clamp (AL)  NW63 Double Claw Clamp (AL)  913806  10

NW63 Bolt Set pkg/4.  NW63 Bolt Set pkg/4.  913906  10

NW80 Centering Ring SS/Viton  NW80 Centering Ring SS/Viton  913608  80

NW80 Viton O-ring  NW80 Viton O-ring  913708  18

NW80 Double Claw Clamp (AL)  NW80 Double Claw Clamp (AL)  913808  10

NW80 Bolt Set pkg/8.  NW80 Bolt Set pkg/8.  913908  20

NW100 Centering Ring SS/Viton  NW100 Centering Ring SS/Viton  913610  80

NW100 Viton O-ring  NW100 Viton O-ring  913710  18

NW100 Double Claw Clamp (AL)  NW100 Double Claw Clamp (AL)  913810  10

NW100 Bolt Set pkg/8.  NW100 Bolt Set pkg/8.  913910  20

NW160 Centering Ring SS/Viton  NW160 Centering Ring SS/Viton  913616  95

NW160 Viton O-ring  NW160 Viton O-ring  913716  30

NW160 Double Claw Clamp (AL)  NW160 Double Claw Clamp (AL)  913816  10

NW160 Bolt Set pkg/8.  NW160 Bolt Set pkg/8.  913916  30

NW200 Centering Ring SS/Viton  NW200 Centering Ring SS/Viton  913620  140

NW200 Viton O-ring  NW200 Viton O-ring  913720  35

NW200 Double Claw Clamp (AL)  NW200 Double Claw Clamp (AL)  913820  10

NW200 Bolt Set pkg/12.  NW200 Bolt Set pkg/12.  913920  40

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