Coach Bolts or Coach Screws

13 Jan 2011
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United Kingdom
I'm in the process of planning a deck, and I will need to attach two 2x6 joists either side of a 4x4 post.

Now, I cannot find a coach bolt or a drill bit that will go right the way through the 8 inches of wood.

Will coach screws on either side be just as good?

Thanks in advance.
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That's great many thanks!

How big does the hole need to be for M10 rods and bolts? The extension says its for 16mm flat bits and upwards?
a hole for a 10mm bolt in wood needs to be very close to 10mm the coach screws is the easy way
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you can mark the joists and drill them separately. No need to go through them all in one if you haven't got a long enough bit.
Timberloks are better than bolts and screws. Use them all the time. Google 'em.

Worth sayin' again! :)

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