BSI BS 6102-9
BS BS 6102-9 1990-JAN-01 Cycles Part 9 Screw Threads Used n Bottom Bracket Assembles
BS BS 6102-9 1990-JAN-01 Cycles Part 9 Screw Threads Used n Bottom Bracket Assembles
Specifies the thread profile and limits and tolerances for the screw threads used to assemble bottom cups to bottom brackets on bicycles (adjustable cups with right hand thread, fixed cups with left hand thread).