Source for long stainless bolts?

Rivers & creeks

Rivers & creeks

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We need some 150mm stainless countersunk m6 bolts, Scewfix and seascrew don't do them and the local chandleries don't - any tips please?
 
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Countersunk bolts ?

Do bolts come with countersunk heads ?

Countersunk machine screws maybe.
 
Recipie for DIY 150 x 6 countersunk machine screws

Take two M6 nuts.
Lock the two onto the end of and M6 threaded rod
Grind the outside nut until it is countersunk shape.
Allow to cool.
Take the ground nut and fit it to the end of a 150 mm piece of screwed rod with loctite
Allow 24 hours.
Make a saw cut across the nut and into the threaded rod.

One 150 mm countersunk machine screw.

Works as used technique to make countersunk nuts last night. Don’t ask why I need countersunk nuts, it’s a long story.

Only point I would make is that only to be used so long as the safety of the boat is not at risk. If you have access to TIG welding then you could weld on the nut and then grind it flat and make the sawcut.
 
Let me check the shed before you buy any, I may have a box full. Will post again later.

Edit: have just checked and only have 90mm, The Stainless Steel Centre in Plymouth seem to be able to get these things when asked, I suspect a local fastening specialist may be able to help.

Yoda
 
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The Lazy Kipper said:
Tried there but unless I'm using the Wong search terms no one has them. 150mm countersunk....
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Were you to tell us why you need this unusual size fastening, some of us might be able to suggest a modification to whatever it is you are trying to fasten together that would enable you to use standard size, readily available ( and therefore cheaper) machine screws.

After all, we are here to help (when we're not insulting each other) :D
 
To attach a winch to the wheelhouse side, the teak mounting block and wheelhouse wall are 140mm thick, so no option but to use 150mm. Will try Anglia tomorrow, any other suggestions are welcome.
 
The Lazy Kipper said:
To attach a winch to the wheelhouse side, the teak mounting block and wheelhouse wall are 140mm thick, so no option but to use 150mm. Will try Anglia tomorrow, any other suggestions are welcome.
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I have the same problem. New winches to mount on thick existing wooden blocks. I had considered having s/s pedestals fabricated but that would be expensive. Instead I am going to set the longest screws I can get into thickened epoxy.

http://www.westsystem.com/ss/bonding-hardware/
 
IKEA approach?

The Lazy Kipper said:
To attach a winch to the wheelhouse side, the teak mounting block and wheelhouse wall are 140mm thick, so no option but to use 150mm. Will try Anglia tomorrow, any other suggestions are welcome.
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I am not sure if this would work as it will depend on the geometry of the teak block.

You could use a piece of 12 mm SS rod with a 6 mm tapped hole through the side. This is then set in the teak block such that you could use a shorter machine screw from the winch and connect up with the screwed hole in the SS rod.

If you have assembled IKEA furniture, you will know what I am trying to say. J.


PS I have just taken an M6 hex machine screw and using a bench grinder and a hacksaw, have made a very passable countersunk M6 machine screw with a slot head. Angle of the countersunk is not quite right but temperature was getting to -1 so called it a day.
 
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Cross dowels

Jcorstorphine said:
I am not sure if this would work as it will depend on the geometry of the teak block.

You could use a piece of 12 mm SS rod with a 6 mm tapped hole through the side. This is then set in the teak block such that you could use a shorter machine screw from the winch and connect up with the screwed hole in the SS rod.

If you have assembled IKEA furniture, you will know what I am trying to say. J.
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Good idea. This sort of thing but in s/s or bronze:

http://www.screwfix.com/p/cross-dowel-m6-x-25mm-pack-of-50/82524
 
The Lazy Kipper said:
To attach a winch to the wheelhouse side, the teak mounting block and wheelhouse wall are 140mm thick, so no option but to use 150mm. Will try Anglia tomorrow, any other suggestions are welcome.
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Really don't think you need to through bolt if the teak is very firmly attached to the coachroof side. My sheet winches are attached to an Iroko block with woodscrews (2 1/2*14 from memory - it was 15 years ago) and still there.
 
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