Author Topic: Screw sizes and form please ?  (Read 929 times)

Offline Stephen Foster

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Screw sizes and form please ?
« on: 10.02. 2012 17:20 »
Wonder if a Member knows the screw type & size for the "Golden Flash" (pressed metal wing type) fuel tank badge , the kneegrips for same & the small screws holding the dipswitch , etc to the back of clutch / brake levers please ..theis is for My 1956 Swinging Arm "Golden Flash" ...trying to find the above in Stainless steel ?

Regards,
Steve ..
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Offline Beezageezauk

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Re: Screw sizes and form please ?
« Reply #1 on: 10.02. 2012 19:57 »
Hi Stephen,

Sorry I can't help on the dipswitch screws but the information I have for the others is as follows.

Fuel tank badge screws      part number 65-8317    5BA X 1/4inch long.

Kneegrip screws                part number  02-79       1/4 x 26tpi cycle thread x 1/2 inch long.

For the kneegrip screws 1/4 cycle thread and 1/4 BSF are interchangeable.

Although I believe the above information to be correct I would suggest that you checked the threads in your tank with second hand screws before ordering new ones in stainless steel.

Beezageezauk.

beezermacc

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Re: Screw sizes and form please ?
« Reply #2 on: 10.02. 2012 22:10 »
Most of the small screws associated with the electrical system are BA threads. I've just had a look on mine and it measures 3.00 mm across the thread diameter which is half way between 5 and 6BA !, it will be one of the two, not sure which. Dave Middleton www.stainlessmiddleton.co.uk has the best slection I am aware of, Lightning Spares also well worth a call.

Offline Stephen Foster

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Re: Screw sizes and form please ?
« Reply #3 on: 11.02. 2012 07:26 »
Thanks Everyone ,
Ill ring around later Today .

Regards,
Steve....
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Offline duTch

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Re: Screw sizes and form please ?
« Reply #4 on: 01.09. 2016 18:57 »

  Hey Steve, did you find what you need? If so where from?

   
Quote
Fuel tank badge screws;   part number   65-8317       5BA X 1/4inch long.

  I have a '46/7 Longstroke tank on my ~'52 Plunger A10, and have the badges for the tank, and also the proper G/F badges (only accommodated by front(?) screw-hole in the '46/7 tank).

 I'm not so fussed about having badges, but would like to have screws in to keep crap out.
 Contrary to Beezageezauk and Various Suppliers, curiousity makes me look at Draganfly list:- 65-8317 as 6BA and not 5BA *conf*, I even emailed them to check, and they confirmed) , so now I'm confused.

 
 
 The information I dug up is;-
(65-8317 is listed in Parts books for A7/10 Plunger & 'A' group)   (* D/F List as  65-8317  7/64  6 BA  1/4  C/S*)
(Plunger Star Twin uses;-
 65-8201    S/T (& SS?)/ Plate10/#8 ’49-’53 & Plate 22/#12 ’54-’57)  D/F List as  4BA (as do stainlessbits below)

As listed @ http://www.stainlessbits.com/link12.html ;
 65-8201   SCREW   BA   4BAx1/2"   SLOTTED COUNTER SUNK
 65-8317   SCREW   BA   5BAx1/4"      TANK BADGE
   

Draganfly listings;
65-8201   9/64   4 BA   7/16   C/S ( "65-8201   Badge screw for 67-8116    4    A7ST/SS              1953-57" )
65-8317  7/64  6 BA  1/4  C/S   ( "65-8317   Badge screw                    4      B/C/M(not C10L)  1946-60" )                 *????*






Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
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Online trevinoz

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Re: Screw sizes and form please ?
« Reply #5 on: 01.09. 2016 22:09 »
The Flash badge screw is definitely 5 BA. I will have to check the long stroke tank.

Offline duTch

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Re: Screw sizes and form please ?
« Reply #6 on: 02.09. 2016 00:10 »

 Thanks Trev,
  I suspected it be the same as for the ST. being basically same tank.
 I can get a 2.5mm drill shank in loose-snug, so used to clean the hole out, but a 7/64" won't go. 

 ( I included as much info as I found in case someone else needs the S.T. info; dunno 'bout S/S. though, that is on Draganfly, P-list just says " 'A' Group" )
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline duTch

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Re: Screw sizes and form please ?
« Reply #7 on: 02.09. 2016 23:57 »

Quote
...I suspected it be the same as for the ST. being basically same tank.

 What I meant there was; " I suspected it be the same as for the S/T, but it obviously is not (being much smaller than 4BA) ", and 5BA or 6BA seems more likely, with 6BA showing signs of nice fit  *dunno*



Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Online trevinoz

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Re: Screw sizes and form please ?
« Reply #8 on: 03.09. 2016 02:11 »
I checked a plunger A7 tank, it had the brass winged badges, and the thread is either 5BA or 1/8"BSW.  Both screw in but who knows what is original? I lean towards 5BA.

Offline duTch

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Re: Screw sizes and form please ?
« Reply #9 on: 03.09. 2016 03:31 »

 Thanks Trev, I've just stopped for a coldie after I took a punt and bought some 5BA at BJ's for a buck each  *eek*(as far as I'm aware, the only Classic type walk in shop North of the border), only went in a couple of threads by finger(no tools) I'll see how they go.
  I think I tried some 1/8"ww or similar a while ago but can't remember the outcome, I'll see how the 5BA go soon.
 Classic Fasteners have some BA listed at a better price, but I got impatient *bash*.
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Online trevinoz

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Re: Screw sizes and form please ?
« Reply #10 on: 03.09. 2016 23:12 »
Run a tap in Dutch and all will be good.

Offline duTch

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Re: Screw sizes and form please ?
« Reply #11 on: 04.09. 2016 20:09 »
 I don't have taps that size Trev. The 5BA screws didn't go in easily, I stopped after a couple of threads. I tried some 1/8" WW, and same deal- no-go.

 But a funny thang; at the same time, I had to replace my R/H switch-block/Brake lever bracket thingy ('71/2 Conical), and in it is a brake switch held in with a small screw, so I tried that and it screwed straight in to the Tank badge hole.
 It measured up to 0.1095" @ 40TPI (4G), That's about ~2thou than 6BA), and 7.9 less TPI than 6BA *conf*

 Don't forget my tank is probably from a '46/7 A7 (with speedo in tank). It's no big deal, I'm just curious and don't want to mess it up with bigger screws if I don't need to.

Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia