Pan Head Bolts

[penberth3]

Coach bolts or carriage bolts - Stainless Steel of course. Lots of suppliers on ebay.

Another name is cup/square head

 

[Neeves]

Slight drift,

I've tested lots of shackles. If you tension them in a straight line, as they are intended to be used, they always and without exception fail at the thread. Which is logical. Good ones might not distort much before failure (but enough you would need to chop them off, ones of a nefarious background can distort markedly before the pin shears. Stainless shackles can have the UTS of similar sized alloy shackles but distort such that the pin can 'extrude' through the eye and the the steel does not actually snap/break.

I've never had need to get bolts.

Jonathan

 

[Neeves]

What about bolts with rolled threads rather than cut ?

Extending my education:

Rolled threads? - cut threads are easier to understand.

Jonathan

 

[rogerthebodger]

Extending my education:

Rolled threads? - cut threads are easier to understand.

Jonathan

Thread Rolling - Horst Engineering.

 

[Neeves]

Thread Rolling - Horst Engineering.

Thanks Roger,

You, and others, are a constant source of obscure (and often less obscure) snippets of information.

Jonathan

 

[AndyL]

I have some pan head bolts, I think that is the name, and at the top of the shank, as part of and 'under' the domed head, they have a square section that is designed to fit into a square recess - this then locks the head (so that you can tighten the nut at the other end)

The question is - are these simply called pad head bolts?

I ask as you can source other pan head bolts with a recess in the head to accept an alan key.

Cup Square Bolts (according to Blakes Seacocks)

 

[penberth3]

Cup Square Bolts (according to Blakes Seacocks)

Yes, Post #21

 

[Rappey]

Cup Square Bolts (according to Blakes Seacocks)

They would have to call them something special to justify the £32 or whatever per bolt.