What screw to use for planter box?

[khusnil_deo]

Having a dumb moment here. What screw do I use for building my H4 treated pine sleeper planter box for outdoor, inground exposed to the harsh Australian weather conditions. the width of the wood is 5cm thick so pretty much going to sandwich two pieces together making it a 10cm thick.

Thank you in advance.

Community manager's note: Check out How to choose the right screw for the job for expert advice.

[EricL]

Hi @khusnil_deo

I suggest using Zenith 14G x 100mm Galvanised Type 17 Batten Bugle Head Timber Screws - 25 Pack. These screws use a hexagonal key drive head for high torque fastening. They have high corrosion resistance and are ideal for landscaping applications. It sounds like an excellent project. Would it be possible for you to post some photo updates of your project? I'm sure our members would be keen to see your progress. If you have any other questions we can help you with, please let us know.

Eric