Print Page - 1965 B40F carb stud threads ? BSF CEI UNF ??

Title: 1965 B40F carb stud threads ? BSF CEI UNF ??
Post by: hoogerbooger on 11 May, 2018, 17:27

I ask as the Amal site tells me to use nyloc nuts with my Mk1 concentric... so I need to buy these.

On a web search I'm getting conflicting info on the thread. I've tested with some other 5/16 bsf nuts I have it wouldn't appear to be a bsf thread.

Anyone know what it ought to be for a 1965 B40f ?

Title: Re: 1965 B40F carb stud threads ? BSF CEI UNF ??
Post by: JulianS on 11 May, 2018, 19:27

Should be 5/16 x 26tpi cycle.

BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: hoogerbooger on 11 May, 2018, 17:27