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Technical Data

I put together some data that I hope you find useful.

 

• Across flats dimensions of hex headed bolts
  
  

• BSCY thread data
  
  

• Torque wrench settings for British Standard bolts
  
  

• Screw Gauge conversion chart
  
  

• Tapping drill sizing
  
  

• How to identify threads
  
  

• Convert Number and letter drills to metric sizing
  
  

• Schrader tyre valve data
  
  

• Thread indentification charts
  
  

• tpi vs pitch
  Two charts to covert tpi to pitch and pitch to tpi
  
  

• Pilot hole sizes for wood and self tapping screws
  Suggested size of hole to be pre-drilled when using these screws