Please can anyone advise what thread is used for the two little screws that secure the lower fork cover onto the alloy leg?
SELF-TAPPING SCREW FOR LON…
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Previously Phil Hannam wro…
Previously Phil Hannam wrote:
SCREW FOR LONG ROADHOLDER SHROUDSPART NO -B2/626
TYPICALLY USED ON THE LONG ROADHOLDER CHROME FORK SHROUDS, (FOUR SCREWS REQUIRED TO FIT THE SHROUDS)
MANY OTHER APPLICATIONS.SIZE: 2.9MM X 6.5MMFITS: SINGLES & TWINSMATERIAL: STAINLESS STEEL
Available from RGM As Below (& others)
Orderline: +44 (0)1946 841517
Monday to Friday 9am - 5pm
Phil,
Thanks for this, I was more interested to know whether it is BA, BSF, Cycle or some other obscure thread type.
PSH
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My Mistake......deleted th…
My Mistake......deleted the important bit.
SELF TAPPING SCREW FOR LONG ROADHOLDER SHROUDS
Posting ammended.
Most unusual for the Norton factory to fit on their bikes. You get them round the rear hub cover on late 1950s bikes and on the even later TLS plates but I believe everything else is studs, bolts or those strange bang in and forget twisted pins.
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responding to the "auctual…
responding to the "auctual thread size", my records show B2/626 to be a 5BA x 5/32" screw with a slotted dome head.
Weird that it would say "self tapping"? Perhaps the original screw had a "chip groove" cut in it to cut threads as it was installed & future screws dont require the thread cutting feature?
HMMMMMMMMMMMMMMM?
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Skip ....... Your posting…
Skip ....... Your posting makes more sense. More so as I always thought that self-tapping screws were an invention that arrived in the late 60s along with Silicon Goo. I would have expected that a self-tapping screw, inserted into solid Aluminium, to just pull out shards of metal. But they were definitely used on the Dommie rear hub plates.
See attachment for picture of offending B2/626 item as described suitable.
Attachments Shroud%20Screws.doc- Log in to post comments
Hi Phil, That screw is wha…
Hi Phil,
That screw is what I call a self tapping sheet metal screw (Th threads go all the way up to the head). I am sure it would work, but it would destroy the BA machine threads from the factory.
For what it's worth, on both the Andover Norton site & the Norvil site, the screw is sold with a 5BA machine screw thread, rather than the sheet metal screw thread (which is much coarser than the original). I suppose if your original %BA threads were stripped & you didnt want to go to the expense of a Helicoil to repair the threads to the original thread form, one could use the sheet metal screw to get buy & it would probably work alright.
Skip
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Previously Skip Brolund wr…
Previously Skip Brolund wrote:
Hi Phil,
That screw is what I call a self tapping sheet metal screw (Th threads go all the way up to the head). I am sure it would work, but it would destroy the BA machine threads from the factory.
For what it's worth, on both the Andover Norton site & the Norvil site, the screw is sold with a 5BA machine screw thread, rather than the sheet metal screw thread (which is much coarser than the original). I suppose if your original %BA threads were stripped & you didnt want to go to the expense of a Helicoil to repair the threads to the original thread form, one could use the sheet metal screw to get buy & it would probably work alright.
Skip
Skip / Phil,
I've had time today to take out a screw from my 1955 ES2 and the thread is 40 TPI x 1/8". This appears to be similar to a Model Engineer thread based on a Whitworth thread form. No wonder I was confused!
I wouldn't entertain the use of a self tapping screw unless the original thread had been destroyed. 5BA is close but I don't have a thread gauge for 43 TPI to check it. As my next door neighbour is a precision Model Engineer I'll pay him a visit tomorrow to discuss the finer points of engineering threads!
Phil Ham.
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Previously philip_ham wrot…
Previously philip_ham wrote:
Previously Skip Brolund wrote:
Hi Phil,
That screw is what I call a self tapping sheet metal screw (Th threads go all the way up to the head). I am sure it would work, but it would destroy the BA machine threads from the factory.
For what it's worth, on both the Andover Norton site & the Norvil site, the screw is sold with a 5BA machine screw thread, rather than the sheet metal screw thread (which is much coarser than the original). I suppose if your original %BA threads were stripped & you didnt want to go to the expense of a Helicoil to repair the threads to the original thread form, one could use the sheet metal screw to get buy & it would probably work alright.
Skip
Skip / Phil,
I've had time today to take out a screw from my 1955 ES2 and the thread is 40 TPI x 1/8". This appears to be similar to a Model Engineer thread based on a Whitworth thread form. No wonder I was confused!
I wouldn't entertain the use of a self tapping screw unless the original thread had been destroyed. 5BA is close but I don't have a thread gauge for 43 TPI to check it. As my next door neighbour is a precision Model Engineer I'll pay him a visit tomorrow to discuss the finer points of engineering threads!
Phil Ham.
The plot thickens! My 1955 ES2 has screws with 4BA threads, BUT other fork legs I have are a smaller thread! A 6BA tap screws in easily with fingers but is loose, so I'm now after a 5BA tap to investigate this option. This could back up Skips advice given above.
When I find out more I'll enlighten everyone.
Phil Ham
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I think you're right Phil…
I think you're right Phil...5BA with cheese head.... definitely not self tapping and not dome head.
Les
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Previously les_howard wrot…
Previously les_howard wrote:
I think you're right Phil...5BA with cheese head.... definitely not self tapping and not dome head.
Les
Les,
My 5BA tap arrived today and is definitely the correct size and thread.
I now wonder how this information that we find out is available for other members in the future, when they ask the same question? Is there a database of all the various Norton part numbers which give the sizes etc of individual parts? Skip referred to a reference that detailed this screw was 5BA, what is this list as it sounds useful?
Thanks for all the replies, Phil Ham.
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Phil i think what you are…
Phil
i think what you are airing here could with some effort evolve into something very useful.
During my attempts at Norton restorations I have often been on the search for the correct specifications on fasteners and indeed still am !
Now if somebody are interested in starting like at Library I for one are quite willing to assist inthese matters.
Arne E.
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Previously arne_eftestol w…
Previously arne_eftestol wrote:
Phil
i think what you are airing here could with some effort evolve into something very useful.
During my attempts at Norton restorations I have often been on the search for the correct specifications on fasteners and indeed still am!
Now if somebody are interested in starting like at Library I for one are quite willing to assist inthese matters.
Arne E.
Arne,
I wasn't sure whether a database of these technical details existed, if not then I agree it is a very worthwhile project. Without these details being captured whilst riders and owners still understand the nuances of British thread types there is little hope of future generations wanting to keep Nortons running if it all becomes too difficult.
Perhaps using the Norton Spare Parts booklets as a basis for a NOC database would allow reference to the lists and diagrams but an extra column is needed for the technical details of the part i.e. thread size and length, material spec, colours etc. Also, it may be useful to have the year of the machine being catalogued in another column. I could help with details for a 1955 ES2 and a 1969 Mercury.
Is this something that should be raised at the AGM under Any Other Business?
Phil
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Like the listing below per…
Like the listing below perhaps. Now ammended thanks Skip. Please feel free to fill in the ??? gaps.....anyone.
B2/626
SCREW
BA
5/32â
SLOTTED DOME HEAD
C1/70
WASHER
N/A
9/16"x7/8"x3/32"
D12/310
BOLT
???
???
G/B PIVOT W/NUT
D12/310B
BOLT
???
???
G/B TOP MTG
D12/974
WASHER
N/A
???
E11713
BOLT
CEI
5/16"x26
AJS
E1677
SCREW
???
???
E1962
PLUG
???
???
E2717A
WASHER
N/A
???
E3061
RIVET
N/A
???
BRAKE LINING
E3135
BOLT
CEI
5/16"x26x13/16"
E3154
BOLT
CEI
5/16"x26x1-3/16"
E3214
STUD
CEI
5/16"x26x4"
E3218
NUT
CEI
5/16"x26
FORK STEM DOME CHROME
E3220
NUT
UNF
7/16"x20
DOME CHROME
E3221
NUT
BA
2BA
E3223
NUT
CEI
5/16"x26
E3224
NUT
CEI
3/8"x26
E3226
NUT
???
???
E3227
NUT
CEI
1/2"x20
E3229
NUT
CEI
1/4"x26
E3231
NUT
CEI
5/16"x26
CARB STUD
E3238
NUT
???
???
E3706
BOLT
???
???
E3798
BOLT
CEI
5/16"x26x3/4"
E4261
BOLT
CEI
5/16"x26x3-7/8"
E4440
STUD
CEI
5/16"x26x1-7/8"
E4506
SCREW
UNC
1/4"x20x1-1/2"
E4590
SCREW
CEI
5/16"x26
GRUB
E4591
PLUG
CEI
1/4"x26
GRUB
E4768
NUT
???
9/16"x20
AXLE ATLAS
E5061
RIVET
N/A
1/8"x3/8"
BRAKE LINING
E5257
WASHER
N/A
3/16"x7/16"
FIBER
E5264
WASHER
N/A
1/2"x3/4"
PETCOCK COPPER
E5278
SCREW
BA
2BAx1/2"
CHEESEHEAD
E5377
WASHER
N/A
7/16"x3/4"x.0625
E5455
WASHER
N/A
3/8"x7/8"x1/16"
E5456
WASHER
N/A
5/16"x3/4"x1/16"
E5944A
WASHER
N/A
3/4"x1-1/16x.030
E6055
NUT
CEI
1x20
PRIMARY COVER ATLAS
E6056
WASHER
N/A
???
PRIMARY CASE FIXING
E6085
WASHER
N/A
1-1/4"x1-1/4"
FELT
E6283
WASHER
N/A
1/4"x5/8"
FIBER
B2/626
SCREW
BA
5/32â
SLOTTED DOME HEAD
C1/70
WASHER
N/A
9/16"x7/8"x3/32"
D12/310
BOLT
???
???
G/B PIVOT W/NUT
D12/310B
BOLT
???
???
G/B TOP MTG
D12/974
WASHER
N/A
???
E11713
BOLT
CEI
5/16"x26
AJS
E1677
SCREW
???
???
E1962
PLUG
???
???
E2717A
WASHER
N/A
???
E3061
RIVET
N/A
???
BRAKE LINING
E3135
BOLT
CEI
5/16"x26x13/16"
E3154
BOLT
CEI
5/16"x26x1-3/16"
E3214
STUD
CEI
5/16"x26x4"
E3218
NUT
CEI
5/16"x26
FORK STEM DOME CHROME
E3220
NUT
UNF
7/16"x20
DOME CHROME
E3221
NUT
BA
2BA
E3223
NUT
CEI
5/16"x26
E3224
NUT
CEI
3/8"x26
E3226
NUT
???
???
E3227
NUT
CEI
1/2"x20
E3229
NUT
CEI
1/4"x26
E3231
NUT
CEI
5/16"x26
CARB STUD
E3238
NUT
???
???
E3706
BOLT
???
???
E3798
BOLT
CEI
5/16"x26x3/4"
E4261
BOLT
CEI
5/16"x26x3-7/8"
E4440
STUD
CEI
5/16"x26x1-7/8"
E4506
SCREW
UNC
1/4"x20x1-1/2"
E4590
SCREW
CEI
5/16"x26
GRUB
E4591
PLUG
CEI
1/4"x26
GRUB
E4768
NUT
???
9/16"x20
AXLE ATLAS
E5061
RIVET
N/A
1/8"x3/8"
BRAKE LINING
E5257
WASHER
N/A
3/16"x7/16"
FIBER
E5264
WASHER
N/A
1/2"x3/4"
PETCOCK COPPER
E5278
SCREW
BA
2BAx1/2"
CHEESEHEAD
E5377
WASHER
N/A
7/16"x3/4"x.0625
E5455
WASHER
N/A
3/8"x7/8"x1/16"
E5456
WASHER
N/A
5/16"x3/4"x1/16"
E5944A
WASHER
N/A
3/4"x1-1/16x.030
E6055
NUT
CEI
1x20
PRIMARY COVER ATLAS
E6056
WASHER
N/A
???
PRIMARY CASE FIXING
E6085
WASHER
N/A
1-1/4"x1-1/4"
FELT
E6283
WASHER
N/A
1/4"x5/8"
FIBER
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Like the listing below per…
Like the listing below perhaps. Now ammended - thanks Skip. Please feel free to fill in the ??? gaps.....anyone. Only 31 more pages to go.
B2/626
SCREW
BA
5BA x 5/32â
SLOTTED DOME HEAD
C1/70
WASHER
N/A
9/16"x7/8"x3/32"
D12/310
BOLT
???
???
G/B PIVOT W/NUT
D12/310B
BOLT
???
???
G/B TOP MTG
D12/974
WASHER
N/A
???
E11713
BOLT
CEI
5/16"x26
AJS
E1677
SCREW
???
???
E1962
PLUG
???
???
E2717A
WASHER
N/A
???
E3061
RIVET
N/A
???
BRAKE LINING
E3135
BOLT
CEI
5/16"x26x13/16"
E3154
BOLT
CEI
5/16"x26x1-3/16"
E3214
STUD
CEI
5/16"x26x4"
E3218
NUT
CEI
5/16"x26
FORK STEM DOME CHROME
E3220
NUT
UNF
7/16"x20
DOME CHROME
E3221
NUT
BA
2BA
E3223
NUT
CEI
5/16"x26
E3224
NUT
CEI
3/8"x26
E3226
NUT
???
???
E3227
NUT
CEI
1/2"x20
E3229
NUT
CEI
1/4"x26
E3231
NUT
CEI
5/16"x26
CARB STUD
E3238
NUT
???
???
E3706
BOLT
???
???
E3798
BOLT
CEI
5/16"x26x3/4"
E4261
BOLT
CEI
5/16"x26x3-7/8"
E4440
STUD
CEI
5/16"x26x1-7/8"
E4506
SCREW
UNC
1/4"x20x1-1/2"
E4590
SCREW
CEI
5/16"x26
GRUB
E4591
PLUG
CEI
1/4"x26
GRUB
E4768
NUT
???
9/16"x20
AXLE ATLAS
E5061
RIVET
N/A
1/8"x3/8"
BRAKE LINING
E5257
WASHER
N/A
3/16"x7/16"
FIBER
E5264
WASHER
N/A
1/2"x3/4"
PETCOCK COPPER
E5278
SCREW
BA
2BAx1/2"
CHEESEHEAD
E5377
WASHER
N/A
7/16"x3/4"x.0625
E5455
WASHER
N/A
3/8"x7/8"x1/16"
E5456
WASHER
N/A
5/16"x3/4"x1/16"
E5944A
WASHER
N/A
3/4"x1-1/16x.030
E6055
NUT
CEI
1x20
PRIMARY COVER ATLAS
E6056
WASHER
N/A
???
PRIMARY CASE FIXING
E6085
WASHER
N/A
1-1/4"x1-1/4"
FELT
E6283
WASHER
N/A
1/4"x5/8"
FIBER
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Phil, As if by magic you s…
Phil,
As if by magic you supply a list, but where is this kept and is it available for members to refer to? Can this be developed into a Really Useful Reference document for all models? If a list was open to members to fill in the gaps, a bit like Wikipeedia, would it need authentification to ensure original factory specs are used and not overwritten with some other erroneous details?
By the way, I agree with Les that B2/626 should be a cheesehead screw. Also, note my findings that these screws can be 4BA or 5BA.
Thanks for your help, Phil Ham
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Phil May I give some sugge…
Phil
May I give some suggestions ?
In addition to the parts no given, what about one column for the earlier partnumbers, and indeed one for the later ones. Then it may be used for cross Reference.
Also I was thinking: is it possible to make this table With a column at the end where a link may be inserted (thumbnail ?) wich will contain a scetch eventually ?
And maybe also a column for surface finish ?
Arne
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Like the version attached?…
Like the version attached???
Attachments page-4-bmp- Log in to post comments
Previously Phil Hannam wro…
Previously Phil Hannam wrote:
Like the version attached???
Phil,
Exactly, the sort of thing I was dreaming of! I like the expression 40 Ton steel for some of the studs. How can we progress this within the Club?
Thanks for revealing all! Phil Ham
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Here is a database of fast…
Here is a database of fasteners: http://stainlessbits.com/link12a.html
Some omissions, but often helpfull.
Fritz
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PART NO -B2/626
TYPICALLY USED ON THE LONG ROADHOLDER CHROME FORK SHROUDS, (FOUR SCREWS REQUIRED TO FIT THE SHROUDS)
MANY OTHER APPLICATIONS. SIZE: 2.9MM X 6.5MM FITS: SINGLES & TWINS MATERIAL: STAINLESS STEEL
Available from RGM As Below (& others)
Orderline: +44 (0)1946 841517
Monday to Friday 9am - 5pm