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Title: Bolt thread size
Post by: courtney on 24 Jul, 2021, 12:03

Hello,

Hoping someone can assist. What's the thread size of the bolt that holds on the auto advance unit on a 1965 C15, please? It's not on the parts list online to find the size.

Please and thank you.

Title: Re: Bolt thread size
Post by: Ian C on 24 Jul, 2021, 12:24

Assuming sidepoints? As far as I can make out, BSA part no. 76-0290 was 1/4" x 26tpi x 2 1/4"long . HTH

Title: Re: Bolt thread size
Post by: courtney on 24 Jul, 2021, 13:13

Thanks. It's side points. Is it UNF?

Title: Re: Bolt thread size
Post by: Ian C on 24 Jul, 2021, 14:07

Its Cycle thread (26tpi). 1/4" UNF is 28tpi.

Title: Re: Bolt thread size
Post by: courtney on 24 Jul, 2021, 14:17

Many thanks for your help. It's greatly appreciated.

Title: Re: Bolt thread size
Post by: Ian C on 24 Jul, 2021, 15:55

No problem.. Glad to be of help. :)

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The BSA Workshop => Singles => Topic started by: courtney on 24 Jul, 2021, 12:03