Claud butter eyelet size

S.bike

Dirt Disciple
Hi
I have a claud butler frame 60s/70s
I think it needs imperial bolts
What size bolt is needed for the rack Eyelets?
Cheers
 
Re:

Cheers
Is 2ba the wrong size?
I couldn't find anything when I searched for 54 tpi
Sorry I don't know anything about imperial sizes
 
2BA is .185 inch diam and about 32 tpi, very slightly smaller than 3/16 inch, which was probably 32 tpi. brains in neutral sometimes now.
Keith
 
Re:

When I had a similar problem:

Thread is probably 2BA if a normal M5 thread is too tight in the hole. 2BA is about 4.7mm outside diameter, but with a pitch of 0.8mm, same as normal M5.
If the M5 is really loose in the hole but binds up eventually, the threads are most likely 1BA, so around 5.3mm OD, but this has a 0.9mm equivalent pitch.

All the best,
 
Not 2BA which is too small, but will work.
The screws we used were cheese head zinc plated 3/16 x 32 BSF. Not BA.

I get an occasional flash of real memory.

Keith
 
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