[C320-list] Bolt size specification needed, please

[Chris Burti]

Graeme,
Make it easy on yourself. Thicken epoxy by mixing wood sawdust into the
resin. Fill the existing holes with the thickened epoxy and let it set.
Select metric equivalent coachscrews the length you need and pre-drill the
holes with the recommended bit and forget SAE.

On Fri, Nov 14, 2014 at 4:47 AM, Graeme Clark <cg at skyflyer.co.uk> wrote:

> Hi everyone - someone once said of Britain and the USA that we are two
> nations divided by a common language! I need help  because my boat was
> built in the US (obviously!) presumably using US nuts and bolts but over
> here in Britain we have been metricated for some years so I am having
> trouble finding equivalent bolts to replace my engine mount mounting bolts
> (ie the ones that hold the mounts to the bearers that are glassed into the
> boat)
>
> I found that I can use a 14mm spanner to undo them - its not a perfect
> fit, I guess the actual size across flats is a little bit less than 14mm.
> They are coachscrews that look roughly like this
> http://img.auctiva.com/imgdata/1/8/2/9/8/6/7/webimg/732578281_o.jpg
>
> Because I am replacing my engine mounts with a different mount that has a
> thicker base, I need a slightly longer screw to penetrate the bearer to the
> same depth. I assume the bearer is wood  and i want to obtain screws with
> the same thread pitch and diameter so that I dont end up cutting a new
> thread over the old, which will greatly weaken the attachment.
>
> I am guessing that catalina will have used a stainless version of a
> standard off-the-shelf coachscrew available in pretty much any US hardware
> store -  can anyone tell me what the specification is?
>
> Thanks
>
> Graeme
> ‘Jaskar’, #366, Falmouth, Britain
>
>
>
>


-- 
Chris Burti
Farmville, NC