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Spark Plugs

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Spark Plugs

Post by ukluke on Sat May 05 2012, 12:30

Does anyone know what thread the top of an old spark plug is, i'm talking about the HT lead end. I'm after a nice knurled nut, iv found some on feepay but not sure which one i need, and cant find a die here that fit's to check. It's for a Champion 7com to go on my 1921 RH AP.
See these -

2Ba http://www.ebay.co.uk/itm/220891760209?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

And these -

8-32 UNC http://www.ebay.co.uk/itm/261011689598?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Any ideas ?
Cheers
Luke

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Re: Spark Plugs

Post by Capstan on Sun May 06 2012, 15:51

In the past I believe the standard thread was 5BA.
I'm not sure if this is still in use or if it was on every plug in the first place.
Hope this is of some use.
Phil
Arrow Idea

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Re: Spark Plugs

Post by ukluke on Sun May 06 2012, 20:42

I'll check that, i'm not sure it's that small. Nearer a 3 or 2 BA ? I have a BA set.
Cheers.
Luke

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Re: Spark Plugs

Post by billypurves on Tue May 08 2012, 21:01


The Green Sparkplug Company are listing... m4, 2BA and UNC.

http://www.gsparkplug.com/shop/







Last edited by stationary stu on Wed May 09 2012, 10:05; edited 1 time in total (Reason for editing : Link added)

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Re: Spark Plugs

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