BSA fitted this type of steering stem top cap nut to many common models of telescopic forks from the post-war era through 1968, including single-cylinder and twin-cylinder models such as M20, B32, B34, A7, A10, A50, and A65. This top cap has a plain hex with no hole for the steering damper knob.
Finished in chrome, this top cap nut has no hole for the steering damper rod to pass through and is suitable for use with models where the steering damper components have been omitted. Approximately 1-5/16″ ID with 26 TPI CEI threads. Made in the UK by TJ Wassell.
The chrome top cap is threaded to the castellated top of the adjustable sleeve nut on the steering stem to finish the assembly.
A spanner or socket is used to turn the hex on top of the nut to loosen or tighten the top cap. Refer to the factory workshop manual for service details.Â
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