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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Restoring the last of the series "A" Comets.
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<blockquote data-quote="A_HRD" data-source="post: 82483" data-attributes="member: 49"><p>Greg,</p><p></p><p>Two things. Firstly, lest there be any doubt, almost ALL the threads were 26tpi CEI threads. But obviously, BSW in alloy. One exception that comes to mind is the rear springbox thin-nuts which were usually 0.710" hex and 7/16 " x 20tpi Whit Form of which I made a batch in SS (sorry!) a couple of weeks ago. </p><p></p><p>Secondly, we had some email-exchanges over the last week or so in the UK between several Series A addicts on the subject of the original fastener finish. There were some anecdotal views about parkerising and cad but no-one could be absolutely certain. Why not ask the Series A guru, Andrew Walker, and be sure to let us know the answer...</p><p></p><p>Peter B</p></blockquote><p></p>
[QUOTE="A_HRD, post: 82483, member: 49"] Greg, Two things. Firstly, lest there be any doubt, almost ALL the threads were 26tpi CEI threads. But obviously, BSW in alloy. One exception that comes to mind is the rear springbox thin-nuts which were usually 0.710" hex and 7/16 " x 20tpi Whit Form of which I made a batch in SS (sorry!) a couple of weeks ago. Secondly, we had some email-exchanges over the last week or so in the UK between several Series A addicts on the subject of the original fastener finish. There were some anecdotal views about parkerising and cad but no-one could be absolutely certain. Why not ask the Series A guru, Andrew Walker, and be sure to let us know the answer... Peter B [/QUOTE]
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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Restoring the last of the series "A" Comets.
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