Threads in forks

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Threads in forks

Postby Harry44 » Thu Nov 09, 2017 9:20 pm

The India made mudguards are coming along nicely so far. But the bolts holding the front mudguard stays to the bottom of the fork sliders were too small and held in place with nuts. The threads in the forks look good so I'd like to do a proper job. So I need to get new bolts. Can anyone tell me what the thread form would be for a 1957 18s

Thanks in advance Harry
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Re: Threads in forks

Postby dave16mct » Thu Nov 09, 2017 9:37 pm

They are 5/16" BSF.
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Re: Threads in forks

Postby Harry44 » Thu Nov 09, 2017 11:18 pm

Thanks Dave. Ebay here I come
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Re: Threads in forks

Postby 56G80S » Mon Nov 13, 2017 8:15 pm

Don't the Club or AMC Clasics have them?

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Re: Threads in forks

Postby Harry44 » Tue Nov 14, 2017 9:22 am

56G80S wrote:Don't the Club or AMC Clasics have them?

Johnny B


I expect so and I use the club spares as much as I can, but the postage for two bolts is a bit too much.
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Re: Threads in forks

Postby raffles » Thu Nov 16, 2017 7:20 pm

But will you be able to buy the correct bolts?they are 5/16 bsf but with a 3/16 whit head not 1/4.
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Re: Threads in forks

Postby Harry44 » Thu Nov 16, 2017 10:26 pm

raffles wrote:But will you be able to buy the correct bolts?they are 5/16 bsf but with a 3/16 whit head not 1/4.
Tony



Oops that'll upset the rivet counters :D

The bolts I'm using are longer than standard so that I can put locknuts on 'tother end
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