Cycle thread

[FrankG]

Hi all, I know it is 26TPI but is it 55 degrees.

Frank

[piston 197]

No, British Cycle threads are 60 Deg. the same as ISO Metric threads and unlike other threads BSF,BSW etc which are 55 Deg.
Cycle 1/4" x 26TPI thread is the same pitch as 1/4 x 26TPI BSF and a 1/4" BSF bolt will go into a 1/4" cycle thread nut, but not the other way round, albeit very slightly slack, other sizes of BSF and BSW are different TPI to cycle , it is just 1/4" where the TPI is the same as Cycle

[FrankG]

Thanks John

Frank

[Sponsored content]