sender units bolt thread

[Walter Prechsl privat]

it seems mike is right. i can measure 32 tpi and a diameter of about 3,96mm = 0,158" that should be UNC 8 32 tpi !? walter

----- Original Message ----- [b]From:[/b] Oldmgdoc@aol.com [b]To:[/b] walter@publi-consult.com [b]Sent:[/b] Thursday, June 07, 2001 4:32 AM [b]Subject:[/b] Re: [mg-tabc] sender units bolt thread The tank unit thread is 8-32. Mike Goodman

[erwin.lifestyle@t-online.de]

Why is someone with no sense of humour driving a T? -----Urspr ngliche Nachricht----- Von: mrbadger mrbadger@home.com> An: candahill@worldnet.att.net>; mg-tabc@yahoogroups.com> Gesendet: Donnerstag, 7. Juni 2001 20:29 Betreff: Re: [mg-tabc] sender units bolt thread

> > > mrbadger wrote: > > > > > > Can we please move on to a new thread? > > > ...I could do without the flippant remarks... > > Charles Hill > > It's a joke Chuckie, just a joke. Lighten up! > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > >

[seabrook@en.com]

A good source for BA & BSF machine screws & nuts is Metric & Multistandard Components Corp in Hawthorne, NY 800-431-2792. They have a catalog & many other fasteners too. Craig Seabrook Whitworth Shop Chip Old wrote:

> > On Wed, 6 Jun 2001, Charles Hill wrote: > > > Actually, I would like to know more about the BA threads used in TCs. > > It seems like practically every nut, bolt and screw less than 1/4 inch > > is a BA thread. Information on this standard is hard to come by, and > > the hardware is even harder to find. >

[Roger Furneaux]

Re: [mg-tabc] Sender units bolt thread hi Charles - you did ask, so here goes... BA stands for British Association (of what though?) and is actually a METRIC thread!!! It was filched from the Swiss who invented it for watchmaking. Now here comes the maths: The pitch P = 0.9 to the power of N, the BA number, rounded off to the nearest 0.01mm. Rather than try to use a tpi thread gauge, it is best to use a proper BA one. The diameter D = 6 x (P raised to the power of 1.2) The very small ones are now obsolete and replaced by standard horological threads, but the ones of interest to us are: BA No. Diam (inches) Pitch (mm) Hexagon size (AF, inches) 0 0.2362 1.00 0.412 1 0.2087 0.90 0.365 2 0.1850 0.81 0.324 3 0.1614 0.73 0.282 4 0.1417 0.66 0.248 5 0.1260 0.59 0.220 6 0.1102 0.53 0.193 I would stake my TC on the fact that there are [b]NO[/b] "foreign" threads on a TA/B.C, so while the 8/32 might be close to 3BA it was never original. Apart from the totally different thread angle (BA 47.5 degs, American fine or coarse 60 degs) it is a slightly larger diam. so while it might appear to be a nice tight fit, it ain't right!!! As I said the other day, BA is still easy to find in England, so contact me if you need any. Actually, BA was used mainly in all the Lucas bits, metric in engine (so e.g. fanbolts are 5mm & not 2BA) and some of the smaller body fixings are BSW (Whitworth). Having just lent an SU carburettor to a friend who has stripped the float bowl bolt thread in the body, so he can get to Silverstone, I now know that this one is 7/16" BSF, when most people would have put money on it being BSP. ocTagonally TCRoger Charles Hill wrote:

>Actually, I would like to know more about the BA threads used in TCs. >It seems like practically every nut, bolt and screw less than 1/4 inch >is a BA thread. Information on this standard is hard to come by, and >the hardware is even harder to find.

[Dave & Diana Dwyer]

Charles You're quite right, in T-types most threads smaller than 1/4 inch are BA. This also extends to most other equipment made in UK, Australia and probably other places with British connexions, up till metrication in mid 70s onwards. Preferred sizes were 'even number' BA, except for Lucas and one or two others who frequently used the 'odd' numbers, like the 3BA securing the fuel tank sender unit. BA fasteners are still fairly readily available in Australia (at least in Sydney). I even bought the 3BA for the tank not too long ago. I would imagine that they could be obtained in UK too - no doubt someone will advise on that. If any of you need BA sizes let me know size, length and head type and I'll see what I can get for you locally. Regards Dave Dwyer J2, TA, TC

[mrbadger]

erwin.lifestyle@t-online.de wrote:

> > Why is someone with no sense of humour driving a T? >

Precisely so! I would have thought a sense of humor would be a prerequisite to driving a "T". Badger (Always with tongue firmly planted in cheek in spite of endless drivel about threads and bolts)

[erwin.lifestyle@t-online.de]

Would have thought it somewhat dangerous to drive a T with tongue in cheek, especially down the type of tracks we drive! One could end up with a permanent lisp! It's probably why Badger always seems to drivel! Brian -----Urspr ngliche Nachricht----- Von: mrbadger mrbadger@home.com> An: mg-tabc@yahoogroups.com> Gesendet: Freitag, 8. Juni 2001 12:38 Betreff: Re: [mg-tabc] sender units bolt thread

> erwin.lifestyle@t-online.de wrote: > > > > Why is someone with no sense of humour driving a T? > > > Precisely so! I would have thought a sense of humor would be a > prerequisite to driving a "T". > Badger (Always with tongue firmly planted in cheek in spite of endless > drivel about threads and bolts) > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > >

[Want1937hd@aol.com]

In a message dated 06/08/2001 3:36:23 AM Eastern Daylight Time, seabrook@en.com writes: > Hi Craig, I'll second that recomendation. I've been to their shop and they have a great supply. Bob TC4956

[Want1937hd@aol.com]

In a message dated 06/08/2001 6:39:17 AM Eastern Daylight Time, mrbadger@home.com writes: > DRIVING? Some of you actualy got your pile of parts assembled into something functional? Bob TC4956

[Chip Old]

Yes, I know. I've bought a lot of BS fittings from them over the years. It was from their catalog that I got the data for that chart of BA sizes I posted a few days ago.

On Fri, 8 Jun 2001 seabrook@en.com wrote: > A good source for BA & BSF machine screws & nuts is Metric & > Multistandard Components Corp in Hawthorne, NY 800-431-2792. They have > a catalog & many other fasteners too. Chip