Anyone seen a screen a screw like this?

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seaangler23

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1 snapped and I'm reluctant to use a coach bolt and mess up what threads that are there. 2 hold in the stern gland to a wooden panel and 2 hold the cutlass bearing housing into the fibreglass. Il use 2 good for the cutlass housing as not to mess up the fibreglass and if I can't find one il stick a coach bolt into the wood, I'm probably being fussy but trying to avoid headaches if I can.
 
Looks like a coach screw, although the thread looks a bit fine.
What material and size?
Toolstation do stainless ones up to M10 x 100mm.
 
It might be worth talking to Seaware in Penryn, they have a lot of traditional boat fixings, especially if it's bronze.
 
Yes very similar to a coach screw but with a finer less aggressive thread, have sized it up to coach screws and they have twice the pitch of this thread, it's brass or bronze, aproxx 8mm diameter and 100mm long il need to measure it
 
If it is parallel it could be an Acme thread. Google will give you the full sp.

If this is the case, there is possibly an embedded plate in the hull and a coach screw might well bugger it.
 
doug748 said:
If it is parallel it could be an Acme thread. Google will give you the full sp.

If this is the case, there is possibly an embedded plate in the hull and a coach screw might well bugger it.
Click to expand...

Thats a good point because the first thing I thought of was an old style sash window lock with a wing nut on top. The thread was very similar, parallel and it screwed into an insert in the window frame i.e. designed to be removed and reinserted from time to time.
 
Looked at the other ones and the thread is actually sharp not acme like, that one must have been worn, in going to ram a coach bolt in and hope as I want to launch ASAP
 
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