Can anyone help me identify a bolt thread?
On my imperial steam driven micrometer, the diameter measures 0.392" (so
it's 10mm) and the pitch is 1mm. So muggings here assumes it's a
standard 10mm bolt thread, but having bought one it is much coarser.
What is it, and where can I get a bolt with this thread?
It is M10 x 1.0mm - a non-preferred BS size. You can get the bolts from most
good industrial fastener suppliers, but you are likely to run into minimum
order quantities or charges if you only want one.
The std 10mm pitch is 1.50mm which you'd know if you looked up a bolt pitch
chart on Google or had a Zeus book. 1mm is a fine thread pitch used for special
bolts such as big end bolts and flywheel bolts in engines. But as you don't say
what this bolt is off.....
Dave Baker - Puma Race Engines (www.pumaracing.co.uk)
"How's life Norm?"
"Not for the squeamish, Coach" (Cheers, 1982)
On Fri, 01 Aug 2003 13:03:23 +0100, Nigel Mercier ®
10mm fine. Most of the larger metrics are fairly common in both a
standard and a fine pitch. 1.25 is the usual alternative to the 1.5
coarse pitch, but 1.0 is a standard too.
If the diameter really is 10mm, then it's probably metric - there's no
obvious imperial size close to that.
Is the bolt head marked ?
I thought I had given this info, but in metric.
Is the "root diameter" the diameter of the plain section of the bolt? If
so, it's about 3 thou more than the threaded section, so still 10mm.
If "tpi" is turns per inch, then I guess it will be 25.4, as it is 10
turns per centimeter.
Hi Nigel, if you go to a local factors and talk nicely to the storeman he
may just oblige and find a nut that'll run down the thread thus identifying
it and providing a new bolt at the same time. Richard.
Reminds me of the forger that mistakenly made £9 notes. He puzzled for a
while and then decided to take them to somewhere in deepest Ireland and see
if he could get them changed (pre Euro joke!)
When he got there and handed them to the cashier asking for them to be
changed the question came back
"No problem sir. Would you like them in 7's and 2's or 6's and 3's?"
Duh. My memory is at fault. I knew it was ISO or DIN which
skipped 9mm and indeed quite a lot of integer sizes above that
and thought it was ISO. Can I claim that the hot weather caused
me to mistype DIN in an egregious manner?
If you have nothing to say, or rather, something extremely stupid
and obvious, say it, but in a 'plonking' tone of voice - i.e.
roundly, but hollowly and dogmatically. - Stephen Potter
You can claim whatever you like. Whether you are believed is a matter for
However, IMHO, the value of having a knowledgeable resident group chemist
far outweighs such minor transgressions, so yes you can be let off (just
this once, mind).
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