What is BS 6102-8 - Specification for screw threads about?  
BS 6102-8 is a European Standard that covers the specifications for screw threads used to assemble freewheels on bicycle hubs. BS 6102-8 provides a standard for the particular screw thread used to assemble freewheels on bicycle hubs.
BS 6102-8 specifies the thread profile and limits and tolerances for the screw threads used to assemble freewheels on bicycle hubs.
BS 6102-8 is based on:
- The use of the ISO basic thread profile given in ISO 68
- Satisfactory interchangeability with the corresponding British Standard Cycle (B.S.C.) thread; this has required the use of an inch pitch (t.p.i.)
- The use of screw thread tolerance grades and tolerance positions given in ISO 965-1
- Use of gauges made to ISO 1502
Who is BS 6102-8 - Specification for screw threads for? 
BS 6102-8 on the specification for screw threads is useful for: 
- Manufacturer of bicycles
- Manufacturer of cycle components and products
- Quality assurance services
- Bicycle designers
Why should you use BS 6102-8 - Specification for screw threads?  
Inch screw threads of the British Standard Cycle (B.S.C.) thread profile are used extensively throughout the world for various applications on bicycle components. Proper fitting of the freewheel ensures safety during the ride.
BS 6102-8 provides users guidance on limits and tolerances, including fundamental deviations and maximum material limits and tolerance grades, tolerances and limits of size, ensuring structural strength and integrity in bicycles.
Adoption of BS 6102-8 enables users to standardise various aspects screw threads that are used to assemble freewheels on bicycle hubs to ensure stable operability, safety and longevity in bicycles.
