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Re: BSF or UNF?!?

To: "John Harper" <AH@jharper.demon.co.uk>
Subject: Re: BSF or UNF?!?
From: "Alan Seigrist Blue 100" <healey.nut@gmail.com>
Date: Sun, 16 Jul 2006 11:53:22 +0800
Hi John -

I have a very early BN1 and I think most of it is BSF, even a couple
whitworth bits.  There are also a couple UNF nuts, but I don't know if
they are original or not.

BN2s, however, will be mostly UNF.  Even some of the stuff on the
engine on BN2s is UNF.

Best regards,

Alan

'53 BN1
'53 A90
'64 BJ8

On 7/15/06, John Harper <AH@jharper.demon.co.uk> wrote:
> Mike
>
> As a general rule most items on the 100 chassis are UNF. In the UK we
> were changing over to UNF after W.W.II but items such as the engine,
> early gearbox, suspension parts etc. that came from Austin mostly stayed
> as BSF. In fact the engine in its diesel form kept BSF into the middle
> 1960s.
>
> You are querying about a BN2. With a very few exceptions your car will
> be all UNF except the engine.
>
> To the best of my knowledge there was no thread changes at any time on
> the BN2 throughout its build life.
>
> All the best
>
> >As some of you know I am restoring a BN2 from a rolling inner frame with
> >most of the suspension into a complete car.  The problem is I have had to
> >find, borrow ,steal, beg for or otherwise buy EVERYTHING else to build
> >this car.  I have a drive train and all the sheet metal now.  The sheet
> >metal is almost ready for paint.  The painter says he found 4 cracks in
> >the rear shroud that have to be welded.  He found these cracks after he
> >fitted all the panels.  Paint soon!
> >My question relates to the final assembly of this car.  Is there any way
> >to tell if I have a late BN2 or an early BN2 just from a frame and
> >suspension?  I am told the early BN2s had BSF threads in most of the
> >assembly and the late BN2s had UNF fasteners.  Can I just use UNF threads
> >in any case?  This car had no ID plate, so I don't know what year it was
> >built.  The only ting that told us it was a BN2 was the rear transmission
> >mount on the frame.
> >Mike MacLean
> >55/56? BN2
> >
>
> --
> John Harper




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