Transcription of British Thread Sizes - Trade Classic Bikes
1 Helpful Guide For Various Thread Sizes Thread SizesHere is a list of British Thread Sizes which you may find lists can be emailed should you require hard Terms;TPI- Threads Per Inch, the number of threads per inch length of a ruler against a bolt, count the number of peaks, then you haveThreads Per are various Thread Forms;BA- British AssociationBSC- British Cycle British Standard Unified Fine = British Cycle ThreadSIZETHREADTPIDIADRILL1\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ = British Standard FineSIZETHEADTPIDIADRILL3\ \ \ \ \ \ \ \ \ \ \ = Spark Plug ThreadSIZETHREADTPIDIADRILL1\ \ \ = Unified FineSIZETHREADTPIDIADRILL1\ \ \ \ \ \ \ \ \