Identify Screw Threads from Major Diameter and Thread Pitch
If you spot an error let me know or if you think I have missed a series out out.
Or any comment. |
The table, on the attached link, lists most major thread series sorted in order of increasing Major Diameter then Thread Pitch, from 3mm to 3/4"
Measure the thread Major (outer) Diameter and then the Thread Pitch, and try looking it up. This is not guaranteed to get you the answer but might help. info is included for for:- Metric (Coarse and Fine) Old French Metric - only where not the same as Metric Fine or Coarse System Français (SF) - only where not the same as Metric Fine or Coarse Unified Coarse UNC - which covers American National Coarse ANC Unified Fine UNF - which covers American National Fine ANF Unified Extra Fine UNEF Whitworth BSW British Standard Fine BSF British Standard Cycle BSCy British Standard Pipe Parallel BSPP British Association BA (Grey Cells are calculations from imperial to metric or the other way round) | ||
