Am I a singular Luddite or not?

So what ?? An average set of spanners includes 10,11,12,13,14,15,26,17,18,and

19mm Fits all the metric ones I've come across and don't say you need two spanners for just 8mm bolts because you need the rest to fit other sizes. Just can't see what the fuss is about, just use the spanner that fits.

-- Regards,

John Stevenson Nottingham, England.

Visit the new Model Engineering adverts page at:-

M10 standard was always 17mm, on any standard bolts I've used....

Which is what 90% of bolts on modern vehicles are. Most bolts are flanged on cars now, as it's a further money saving measure. Anyway, I was just using them as an example to highlight why same sized bolts, use different head sizes.

As Nick has higlighted, a 12mm head is not the set standard. It's just a common size, which given your location and proximity to Japan, would explain why 12mm is the accepted standard.

Car manufacturer's don't use the most standard bolts. There's very few standard bolts used on modern vehicles, as most of them are flanged to some extent.

As I said, it has changed (don't ask me when*) ).

*) A standard from 1977 lists: M8 : 13 (14) M10: 17

Nick

I was at the big auto Jumble at Rufforth yesterday morning and there were several suppliers with a bewildering array of BSW, BSF, UNC and UNF of every conceivable type, so I don't think they're going to be hard to get for a while yet, though of course European industry has turned their backs on them.

Greg

My impression from my local bolt supplier is that BSF and Unified are getting rapidly disused/scarcer, though they can get it in to order no problem for decent quantities, while Whit in common sizes is still widely enough used to be readily available. Standard Metric stuff is *much* cheaper than any of the others, though.

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

Just remind us what the "D" in DIN stands for?

Well, obviously a man with a broader experience of metric fasteners than mine! :-) Downunder we're bereft of 26mm spanners in our standard spanner sets...:-(

Tom

So therefore the rest of the world follows your experience? LOL

Bloody hell, care to consider my original point?

And I thought everything was supposed to be so much better downunder

Tim Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

Well lately it would appear that our superiority lies with better hot water systems, cheaper electricity and obliging fastener suppliers. I would imagine that our aesthetic police would turn away the above mentioned spanner sets, at the border, I mean to say, a 26mm spanner amongst the rest? Would certainly play havoc with the geometric display of one's tools...

Tom

I really have been waiting for that question. Now how about answering the "I" in ISO, before it's getting too stupid?

Nick

Really? LOL. "DIN ISO 272" appears to be a figment of your imagination. DIN 272 relates to the Testing of Magnesium OxyChloride screeds, whereas "ISO 272" does pertain to the subject at hand.. Perhaps in the interests of accuracy you may wish to correct your statement?

Tom

For f*ck's sake are things that slack that the only thing to worry about is what size spanner is need if you cross over the border ?

Just mended the grand daughters tricycle today, welded a couple of cracks in the footboard and replaced some bolts on the front forks. Never even looked what spanner size it was just got one off the board that fitted, even managed to do it without anesthetic.

-- Regards,

John Stevenson Nottingham, England.

Visit the new Model Engineering adverts page at:-

Which is where the traders who specialise in such things come in to their own of course. Greg

I take it the repairs to grand-daughter's trike didn't engender any warm and fuzzy feelings? :-)

Tom

Honestly, I can't believe you would admit to such a thing in public. If you can allow that kind of slack behaviour, I expect you will even have used the odd Allen key without consulting all the various BSI ISO and DIN specifications.

Come to think of it, I undid a screw without selecting the perfect sized screwdriver the other day. Now I feel unclean and must chastise myself with the barbed wire again.

Pete "The nice thing about standards is that there are so many of them. It is always possible to find one that suits your needs."

I do have the impression that you want to show off with your ignorance and stupidity. It is OK for me, as it is for you.

Enter "DIN ISO 272" into google and hit return. Is that too complex for you? OK, here are a few ...

Nick