Author Topic: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.  (Read 2343 times)

Offline Stephen Arsenal

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Hi can anyone know the screw width and length they mus be quite thin ??? thanks
ho ho ho

Offline A10Boy

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #1 on: 14.10. 2009 21:13 »
They are a BA size, don't remember which, either 2 or 4ba.
Regards

Andy

1960 A10 - Black Golden Flash
Plus
1974 Kawasaki Z1a
Yam XJR 1300

Offline Desburnett

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #2 on: 14.10. 2009 21:26 »
Hi,
The screws are 3BA and need to be 3/4" long under head.
I came to fit my badges this last weekend that came with screws only to find out they were too short to even protrude through the badge.

Des

Offline LJ.

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #3 on: 14.10. 2009 22:17 »
Its a funny thing seeing this new thread as I fitted some pear shape badges only this morning but with horrible rusty screws... I'm wondering if they are available in 3BA brass, anyone know if they are about?
Ride Safely Lads! LJ.
**********************
1940 BSA M20 500cc Girder/Rigid- (SOLD)
1947 BSA M21 600cc Girder/Rigid-Green
1949 BSA A7   500cc Girder/Plunger Star Twin-(SOLD)
1953 BSA B33  500cc Teles/Plunger-Maroon
1961 BSA A10  650cc Golden Flash-Blue
1961 BSA A10  650cc Golden Flash-Red

Offline Desburnett

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #4 on: 14.10. 2009 22:45 »
You might find them in an old style electrical store but they are like rocking horse droppings. Probably more chance of picking up stainless ones from one of the stainless specialists that exhibit at classic shows. Stafford Classic bike show is on this week-end and I believe Kempton Park the week after.

Online chaterlea25

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #5 on: 14.10. 2009 22:51 »
Hi All,
3BA is within a gnats whisker of 4mm x 0.7
mostly they will interchange, *ex* *ex*
Cheers
John
1961 Super Rocket
1963 RGS (ongoing)

Offline Stephen Arsenal

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #6 on: 15.10. 2009 14:30 »
Great,thanks,just bought 2 4.45 mm screws,fit like a glove, er but is that secure enough,or shpould i glue them /and rubbers as well against exrta vibtration or the local pear shaped BSA logo thieves.Another quick qustion,how thick is the red boarder that is betwen the chrome and painted area of the petrol tank  ? 5 mm ??
ho ho ho

Offline trevinoz

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #7 on: 15.10. 2009 20:59 »
Stephen,
               I guess you mean the pin striping between the main colour and the chrome.
3mm would be plenty wide enough.
Use a bit of loctite on your badge screws, not the high strength stuff.
Trev.

Online BSA_54A10

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #8 on: 16.10. 2009 10:01 »
And put an O ring under the head to stop you cracking the head when you tighten the screw too much.
ISO metric and BA thread profiles are nothing like each other but as there is no load you might get away with it.
There is more to threads than just having the same number of threads.
If you over tighten the screws then you will tear the tips off the BA thread, rendering the hole unuseable so please be careful
Bike Beesa
Trevor

Offline A10Boy

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #9 on: 16.10. 2009 15:07 »
If you search any of the stainless steel screw suppliers on ebay, they will get the right BA screws to your door without you even having to leave your armchair.
Regards

Andy

1960 A10 - Black Golden Flash
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1974 Kawasaki Z1a
Yam XJR 1300

Offline trevinoz

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #10 on: 17.10. 2009 04:48 »
I don't know about the rest of the world but here in Oz the odd size BA screws are out of production. The even ones seem to be fairly easy to come by.
By the way, Domiracer had the 3BA screws listed in their last special poster.
Trev.

Offline Stephen Arsenal

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #11 on: 18.10. 2009 20:29 »
Stephen,
               I guess you mean the pin striping between the main colour and the chrome.
3mm would be plenty wide enough.
Use a bit of loctite on your badge screws, not the high strength stuff.
Trev.
Thanks for the info,is the red pin stripe a transfer or must it be painted on ??
ho ho ho

Offline trevinoz

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #12 on: 19.10. 2009 03:33 »
The pin stripe originally was hand painted. It's not easy to find someone to do this nowadays.
You will find tape on a lot of them now.
Another way is to spray the line colour and mask it while the main colour is sprayed.
Trev.

Offline LJ.

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #13 on: 19.10. 2009 10:10 »
Actually lining by hand is not that hard to do if you have the correct brush and steady hand! These pure sable whip liners I've had since I was eighteen as an apprentice painter but only just used them after many years of storage. There is no doubt that hand lining gives that special touch with older bikes but I'd think that by the time the mid fifties and early sixties had arrived, tape would have been the norm.

With paint you get a better flow at the edges where with tape you get a sharp edge, you can see that edge under the gold paint in the photo where I masked between the silver and red paint.

(I know... I like chrome but I'm selling this tank on soon.)
Ride Safely Lads! LJ.
**********************
1940 BSA M20 500cc Girder/Rigid- (SOLD)
1947 BSA M21 600cc Girder/Rigid-Green
1949 BSA A7   500cc Girder/Plunger Star Twin-(SOLD)
1953 BSA B33  500cc Teles/Plunger-Maroon
1961 BSA A10  650cc Golden Flash-Blue
1961 BSA A10  650cc Golden Flash-Red

Online bsa-bill

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Re: Screw sizes for pair shaped BSA Logo A 10 Fuel Tank.
« Reply #14 on: 19.10. 2009 10:54 »
It's the very slight imperfections in hand lining that give it the edge for me, just love it.
Bit like that woman singing "Wild Horses" in an operatic type voice, now that song needs to be sung badly, Mick did it justice.

All the best - Bill
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco