Specifications of International Thread Standards

Different threads emerged from developments in bicycle production, many of them are from the late 19th or early 20th century, partly from the US or Great Britain, which is the reason why inch dimensions are still in use until today.
The flank angle is 60°.

Thread Size
mm
Major
Diameter
mm
Tapping
Drill Size
mm
TPI
 
Pitch
mm
Fg 22.0961.613560.454
Fg 2.32.2991.816560.454
Fg 2.62.6042.121560.454
Fg 6.356.3505.310260.977
Fg 7.97.9386.898260.977
Fg 9.59.5258.485260.977
Fg 14.314.28812.934201.270
Fg 25.425.40024.272241.058
Fg 32.832.76631.638241.058
Fg 34.834.79833.670241.058
Cycle Thread