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Bottle threads determination

GL Threads

  • Round threads at the flanks
  • high pitch
  • large flanks for important carrying power
  • GL thread one-start thread
  • GLS 80 thread three-start thread
GL Threads


  • GPI = Glass Packaging Institute, trade association representing the North American glass container industry
  • voluntary standards for compatibility of glass
  • containers and closures

Measurement chart for thread determination

Use our size chart to determine the bottle thread.

Measurement chart for thread determination

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