PLUGS, Aerial, Single No. C1 (ZA/CAN 1480)

[David Dunlop]

Hi Grant.

My thought process is vintage British motorcycles and sports cars will still require machine shop work done from time to time.

On the down side, any such vintage owner, will very likely have picked up a small BA Tap and Die set years ago, at the very least to clean up and repair any damaged threads found on their vehicles themselves.

That being said, if a large enough pool of vintage British vehicle owners can be found in any given area, chances are a small machine shop could exist there, supporting that population.

As Chris noted, it is pretty simple lathe work (not that I have ever done any of that) and any lathe with a feed through capability could probably be used to cut three or four plugs at a time. Once separated they could then each be drilled and tapped accordingly.

And also on the bright side, if there is a large enough pool of vintage vehicles in an area, there is very likely a plating shop that could handle that part of the work as well.

There is another version of this type of plug I will do a separate post about shortly.

David

[Bruce Parker (RIP)]

BSF tap and dies sets are available quite easily. BSF is the same as 'NF' except the pitch of the threads is 55 degrees instead of 60.

[Grant Bowker]

https://maccmodels.co.uk/batometric
The link above is to a chart giving metric dimensions for BA threads. The "close BA to metric match" I referred to is 0BA which is almost exactly a M6-1.00 thread, others aren't as good. The company (UK location) sells both BA fasteners and taps/dies.
Another source for BA fasteners, taps and dies is https://britishfasteners.com/ located in New York State.

[rob love]

Originally Posted by Bruce Parker

BSF tap and dies sets are available quite easily. BSF is the same as 'NF' except the pitch of the threads is 55 degrees instead of 60.

Not sure what you mean by "is the same". None of the threads per inch (TPI) match between BSF and UNF.


I will agree that any of the BSF, BSW, or BA threads are easily available on ebay as well as other sites. Even left hand threads can be found with a bit of effort.

[Ron Pier]

I have a complete range of BA taps and dies from 0BA to 6BA. It's easy and cheap here in UK. I use this guy all the time for screws/nuts/bolts etc. taps and dies. https://www.ba-bolts.co.uk/

Ron