Socket Head cap Bolts

[email hidden] wrote On 03/03/06 12:15,:

Quoted message said:

Just tried to replace one of these on my bike stem, the thread has
gone. Tried to by one, but its neither a 6mm one or a 8mm one- in
between- which I can't get anywhere. Need to be a bit longer so I can
get a nut on it. tried evanscycles- no luck. Anybody know a good
on-line site. Screwfix etc only do 6mm. or 8mm- would mine be an
imperial size bolt ?

What make is the stem, and what size allen key does it use?

Is this the clamp bolt, rather than the expander bolt?

How long does it need to be?

Mike

Quoted message said:

Just tried to replace one of these on my bike stem, the thread has
gone. Tried to by one, but its neither a 6mm one or a 8mm one- in
between- which I can't get anywhere. Need to be a bit longer so I can
get a nut on it. tried evanscycles- no luck. Anybody know a good
on-line site. Screwfix etc only do 6mm. or 8mm- would mine be an
imperial size bolt ?

Have you tried a fastener suppliers? Failing that, there's
www.sjscycles.com if you don't mind the £5 postage.

Mr Zog said:

Failing that, there's
www.sjscycles.com if you don't mind the £5 postage.

....Which they now charge on £50+ orders as well.

~PB

Pete Biggs said:

Mr Zog said:

Failing that, there's
www.sjscycles.com if you don't mind the £5 postage.

...Which they now charge on £50+ orders as well.

~PB

they don't get the name 'bandits of bridgewater' for nothing

--
"You can't see paradise if you don't pedal" (Fowler, Chicken Run)

You're going to have to measure it properly - both the diameter, and
the threads-per-inch (for imperial threads), or thread pitch in mm for
metric threads. As it's neither 6 nor 8 it's very probably an imperial
thread, though it's remotely possiblite it's a metric "fine" thread
which could be more suitable for threading into aluminium.
http://www.gewinde-normen.de/en/index.html might be a good start.
Assuming not metric, then something like "British Standard Cycle"
thread might be as likely as a UNC, UNF or BSF thread. eg there is a
DIN 79012 bicycle thread around 6.35mm diamater and another at 7.9
something and CEI (british cycle thread is something else again).

If it's metric, UNC, UNF, BA, BSF, or WW you're in with a chance.
Otherwise you might do just as well to tap out the hole to the next
convenient size up for something you can get eg. M8 if there's enough
meat left for this to fit.

Hywel

You're going to have to measure it properly - both the diameter, and
the threads-per-inch (for imperial threads), or thread pitch in mm for
metric threads. As it's neither 6 nor 8 it's very probably an imperial
thread, though it's remotely possiblite it's a metric "fine" thread
which could be more suitable for threading into aluminium.
http://www.gewinde-normen.de/en/index.html might be a good start.
Assuming not metric, then something like "British Standard Cycle"
thread might be as likely as a UNC, UNF or BSF thread. eg there is a
DIN 79012 bicycle thread around 6.35mm diamater and another at 7.9
something and CEI (british cycle thread is something else again).

If it's metric, UNC, UNF, BA, BSF, or WW you're in with a chance.
Otherwise you might do just as well to tap out the hole to the next
convenient size up for something you can get eg. M8 if there's enough
meat left for this to fit.

Hywel

Response to [email hidden]:

Quoted message said:

Anybody know a good
on-line site. Screwfix etc only do 6mm. or 8mm- would mine be an
imperial size bolt ?

I have to confess, I don't know what a socket head cap bolt is (well, I
presume I more or less understand the bolt bit); but someone here put me
on to Namrick -

http://www.namrick.co.uk/

who sold me just what I was looking for, and quickly too. Try them!

--
Mark, UK
"What arouses the indignation of the honest satirist is not, unless the
man is a prig, the fact that people in positions of power or influence
behave idiotically, or even that they behave wickedly. It is that they
conspire successfully to impose upon the public a picture of themselves
as so very sagacious, honest and well-intentioned."

Pete Biggs said:

Mr Zog said:

Failing that, there's
www.sjscycles.com if you don't mind the £5 postage.

...Which they now charge on £50+ orders as well.

<insert your favourite deity> on a bike! :-O

Mark McNeill said:

Response to [email hidden]:

Quoted message said:

Anybody know a good
on-line site. Screwfix etc only do 6mm. or 8mm- would mine be an
imperial size bolt ?

I have to confess, I don't know what a socket head cap bolt is (well, I
presume I more or less understand the bolt bit); but someone here put me
on to Namrick -

http://www.namrick.co.uk/

who sold me just what I was looking for, and quickly too. Try them!

I think it's an allen bolt with a cylindrical, rather than a domed,
head. Like a bottle cage bolt.

Response to Zog The Undeniable:

Quoted message said:

I think it's an allen bolt with a cylindrical, rather than a domed,
head. Like a bottle cage bolt.

Gotcha; and if I'd bothered to go to the site, rather than just copy the
bookmark ;-), I'd have found the relevant page -

http://www.namrick.co.uk/browse.asp?PCID=10

but it looks like it doesn't include what the OP wanted. O well.

--
Mark, UK
"History teaches us that whenever a weak and ignorant people possess a
thing which a strong and enlightened people want, it must be yielded up
peaceably."