Retaining bolt for saddle (the one that keep the saddle in p

[Philip Benstead]

Help required

I am seeking the following:

Retaining bolt for saddle (the one that keep the saddle in place on the seat pin)

The bolt came form this http://www.dahon.com/bikes/2011/espresso

I measured the bolt as http://engineering.ucdavis.edu/efl/THREADS.pdf

Diameter 7 mm

Length 45 mm

I obtain a stainless steel bolt but not cap head which make the tightening difficult

So I want Cap head (you hexagon spanner to fasten)

Ideally stainless steel

I have been to good screw/bolt shop but they did not have the my exact requirements

I have looked on www without success.

This is not my bike

The saddle was used by a large rider when loose and it bent the bolt

I wish to obtain a small supply for my Dr Bike jobs


Suggestion welcomed

[NUKe]

An old fashioned Local bike shop, Alternatively a local iron monger/Hardware Store.

[Mick F]

What seat post is it?
Do you have the bolt and just want another?

I ask because Shimano and Campag do spares.

Also, in Plymouth - and I'm sure many towns and cities - has a nut and bolt shop. They stock absolutely anything you want in just about any material and any fixing system. I like the shop.
Much better than a hardware store as they specialise in fixings of every sort.
http://www.expressfixing.co.uk/

[tatanab]

45 is an odd length, but you do not specify how you've measured it. You could cut a longer one.
http://www.a2stainless.co.uk/searchresu ... rchterm=m7
http://www.inoxbolt.co.uk/zen/index.php ... m7&x=0&y=0
Still probably better to go to a decent LBS.

[Philip Benstead]

45 is an odd length, but you do not specify how you've measured it. You could cut a longer one.
http://www.a2stainless.co.uk/searchresu ... rchterm=m7
http://www.inoxbolt.co.uk/zen/index.php ... m7&x=0&y=0
Still probably better to go to a decent LBS.

I went to condors in London they did not have one LBC otern strip down old seat posts for the bolt they keep breaking

[breakwellmz]

M7 is a very odd size as well.

I`ve checked two that i have,and they are both M8 coarse.
You aren`t including the head in that length are you?

[Brucey]

I have seen a few with an M7 bolt but M8 is more common.

If the 'nut' is a separate piece and you have a drill, I'm sure you will find a way of making a satisfactory repair even if the bolt is an M7, by installing an M8 bolt instead.

If the nut is not separate, you can drill and tap the fitting to take an M8 bolt.

Note that if the bolt broke because the seat post has serrated faces, slipped, then was overtightened, you are probably wasting your time. You would be better off getting a new seat pin if the clamp has damaged serrations.

cheers

[roadvader]

just take the bolt into your local fixings and fasteners store,available in steel or stainless and for a few quid you will get a bunch of them,

[Brucey]

just take the bolt into your local fixings and fasteners store,available in steel or stainless and for a few quid you will get a bunch of them,

not if it genuinely is an M7. These bolts are like rocking horse poop, even in standard grades. I've tried buying stainless steel ones and it is pretty near impossible. If anyone knows of a good source for stainless M7 x 1 bolts, do tell.

cheers

[Malaconotus]

not if it genuinely is an M7. These bolts are like rocking horse poop, even in standard grades. I've tried buying stainless steel ones and it is pretty near impossible. If anyone knows of a good source for stainless M7 x 1 bolts, do tell.

cheers

Not me. These chaps will sell even single bolts online, and I could not be mroe impressed with them... http://www.titanbolts.co.uk/acatalog/M8 ... _Head.html M8 they can do in any length you like but M7 is not available.