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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

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NW63 Centering Ring SS/Viton  NW63 Centering Ring SS/Viton  913606 

NW63 Viton O-ring  NW63 Viton O-ring  913706 

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

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

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

NW80 Viton O-ring  NW80 Viton O-ring  913708 

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

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

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

NW100 Viton O-ring  NW100 Viton O-ring  913710 

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

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

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

NW160 Viton O-ring  NW160 Viton O-ring  913716 

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

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

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

NW200 Viton O-ring  NW200 Viton O-ring  913720 

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

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

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