[SEL] drill sizes for 7BA clear and 7BA tap

[Edd Payne]

B.A(British association) is was used in instrument making.I have a full set
of these from when I was into model trains and live steam locos.I still find
them handy as some British built mags use BA.When measured these sizes
measure up metric diameters.
EDD PAYNE
PO Box 364 Gulgong N.S.W
Australia
2852
Phone:0263742387
edsengns at optusnet.com.au
edsengns
----- Original Message -----
From: "John Culp" <johnculp at chartertn.net>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Monday, September 25, 2006 3:36 AM
Subject: Re: [SEL] drill sizes for 7BA clear and 7BA tap


> If you squint real hard and look right by my left thumb in this
> picture, you can see that B.A. #1 screw and nut:
>
> http://i56.photobucket.com/albums/g166/SlidePicker/MeWithPersian.jpg
>
> :-D
>
> John Culp
> Bristol, Tennessee, USA
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