Where do you guys find your bolts?

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marshg246 said:
Most bolts are fine thread, not Whitworth or anything British. The gearbox is all British threads but most things aren't. AN often tells you what thread. Some you asked about are 1/4" x 28 which you can get at your local hardware store.
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Really? That’s great. Thanks!
 
jbruney said:
You'll know when you grab hold of a Whitworth. First clue will be that your wrenches just don't seem to be the right size and you start thinking metric?... Well don't pursue that thought order the correct wrenches.... Head bolts comes to mind right off.
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I actually have a set of Whitworth sockets and wrench’s for when I was working on my triumph and BSA.
 
joe czech said:
I went thru this same thing. seems like 80% of the stuff is UNF. I've found that "Old Britts" list the hardware specs in their parts listing callouts. ID'ing the part is half the battle. lots of 1/4-28 stuff, some 5/16-24, and a few 3/8-18. believe it or not, I find most stuff at ACE hardware and lowes (in their specialty bins). I tend to buy bulk items at McMaster-Carr (on-line) - mostly washers and nuts. i usually get small quantities from fleabay - my favorite - https://www.ebay.com/str/The-Bolt-Barn?_trksid=p2047675.l2563. definitely not an expert, but on my 74, seems like only the gearbox hardware and stuff under #10 is British.
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Very cool. Thanks
 
drp said:
Greg Marsh took the "stainless steel bits" info and put them into an excel database so you can easily search by the P/N of the bolt
https://www.gregmarsh.com/index.aspx

Another good source is Old Brits
http://www.oldbritts.com/ob_main.html
they have parts listing and parts diagrams by year and the description has the thread, size and whether are not if they are commercially available. If you have a Commando and are state side Old Brits is a great company to deal with

They also sell them but if they are not special and commercially available I'd recommend Ace, True value or Tractor supply.

CEI or BSC are also easily available from British Fasteners
https://britishfasteners.com/

The fasteners are always a problem on a basket case bike

Dave
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Terrific thanks
 
A few at most are 'Whit Form' we get most queries about these. You will not get them from a local fastener specialist. Why Norton used these is anyones guess.
 
Any classic car specialist, mainly British will supply ass nuts bolts and washers, unf bsf ect I also run a Tr6 car and can buy plenty of stainless nuts and bolts.
 
Madnorton said:
A few at most are 'Whit Form' we get most queries about these.
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A considerable number of AN parts were previously marked as "Whit Form"(?) which were not Whitworth!

Although many seem to have been corrected there are still various items marked 'Whit Form' (or Whit) that are not Whitworth thread.

Madnorton said:
Why Norton used these is anyones guess.
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o_O?
 
Correct, Whit form is used to describe a whitworth thread form used outside the normal table range of whitworth threads, usually with a different TPI. Or this may help others - a Whitworth thread you will find in a whitworth thread table, anything described as Whit Form you will not.

I have even had battles with fastener suppliers saying it can't be, only for their old and bold die makers to confirm it.
 
Madnorton said:
Whit form is used to describe a whitworth thread form used outside the normal table range of whitworth threads, usually with a different TPI.
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Are you saying then that the 20 and 26 tpi items below are not 'Cycle' thread (until recently there were many more but it seems 'Whit Form' has been removed from their description)?

https://andover-norton.co.uk/en/shop-details/17172
https://andover-norton.co.uk/en/shop-details/15262
https://andover-norton.co.uk/en/shop-details/17229
https://andover-norton.co.uk/en/shop-details/17364
 
Yes, not all 20 & 26 tpi are Cycle, many assumed they were and bought Cycle threaded parts from other sources, only to query why they didn't quite seem right.

For what reason Norton decided to use 26 tpi Cei and Whit Form is still a guess, it seems to go against the BSA standards book.
 
One can almost, I say almost, that some of these non standard threads are bastard threads. Oooooh I'm being rude here, - no!
BSA used to make bicycles and cycle thread was bread and butter to them, at that time. . . .
Norton have been going since the 1920s so both of them used cycle threads, that is until. . . . If you look at the factory history the two marquees each had their own imperial to metric change over at different times , you couldn't do worse than buy yourself a metric and imperial thread gauge and learn how to use them.
 
Bernhard said:
One can almost, I say almost, that some of these non standard threads are bastard threads. Oooooh I'm being rude here, - no!
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Not sure if all were 'bastard' but as stated in BS 84, below, (the British Standard specification for BSW and BSF) there were alternatives to the recommended pitch.

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"Exceptional design requirements may, at times, necessitate the use of a screw thread of Whitworth form but having a diameter-pitch combination differing from those recommended in Table 13 and Table 13A and the relevant notes. It is recommended in such cases that the number of threads per inch should be chosen from the following series.
40 36 32 28 26 24 20 18 16 14 12 11 10 8 6 4 threads per inch
The numbers of threads per inch in heavy type are to be regarded as preferred."
____________________________________
 
Truly one can experience an adventure right at home working on their bike.
 
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