BS Cycle threads are used in Bicycle Industry.
Specification
• Basic Dimensions: BS 811-1950 & Gauging Practice: BS 919 Part II - 2007.
Manufacturing Range
Sizes covered are SWG series for spokes & Nipples - SWG 8,9,10 & 11, Diameter 1/8 to 31/32 with various TPI as specified in specification.