What is the difference between BSC and BSF threads? All of my spanners are marked as being BSW, BSF or BA. I know that BSW threads are a course thread form, and are typically used where a stud or bolt is screwed into ally castings etc, and that BA is most commonly used in electrical equipment. What I am confused about is the differences between BSF and BSC. The reason I need to know is because I want to clean up some of the threads on some of my studs, and I need to know what dies to get.
John