stainless steel screws for chestnut cladding / decking etc

[marmic]

This might help if anyone else searching for stainless steel screws for chestnut cladding / decking etc in what I found to be a significant minefield with massive cost and clearly quality differentials!  A good few hours down the pan!  Eventually found these and placed order today - proof will be in the pudding so no comments on quality etc as yet but feeling quietly confident. So not a recommendation -  let's hope it will be................ You can also speak with a normal human who knows what they are talking about!

 

https://www.endurastainless.com/stainless-woodscrews/decking-screws---countersunk-stainless-steel---torx-drive/decking-screw-countersunk-torx-tx-drive-stainless-steel-a4-marine-grade-316 

  

also very interesting:  https://www.fastenerusa.com/blog/tell-screw-stainless-steel?srsltid=AfmBOoogzyXC-QceFYTVxyxBdILjVskzH34yHohaOgi9x-y49Rw3NaQG 

[Nestor]

I used 1000's of these from Screwfix to fix Cedar and Douglas Fir Cladding. 

Worked well, good value, a little delicate if you want to keep removing them. Need to be square on. 

Described as stainless steel construction.

[ectoplasmosis]

14 hours ago, Nestor said:

I used 1000's of these from Screwfix to fix Cedar and Douglas Fir Cladding. 

Worked well, good value, a little delicate if you want to keep removing them. Need to be square on. 

Described as stainless steel construction.

These are great, I used them to fix the T&G plywood flooring in my loft. Tiny heads which become almost invisible, and easily removable should you require. 

[marmic]

On 05/12/2025 at 18:08, Nestor said:

I used 1000's of these from Screwfix to fix Cedar and Douglas Fir Cladding. 

Worked well, good value, a little delicate if you want to keep removing them. Need to be square on. 

Described as stainless steel construction.

 

[marmic]

I looked at these but only A2, they also offer A4 with a slighty different [deck version] - but decided the square/robertson drive not for me with more chance of camming out - albeit will probably 'stick on the bit better' and perhaps look a little nicer

[Nestor]

16 minutes ago, marmic said:

I looked at these but only A2, they also offer A4 with a slighty different [deck version] 

I am still learning, the molybdenum is the difference.

[JohnMo]

22 minutes ago, Nestor said:

I am still learning, the molybdenum is the difference.

It's a bit more than that, physically they have different yield and tensile strength and different corrosion resistance. A4 being better than A2.