Ok after spending several hours today searching for 1/4" x20 by 1" long self tapping bolts for my coroplast reinstall I am confused. The stock 1/4" self drilling bolts GD used appear to be grade 2 zinc plated. Is this a correct assumption? Over time I have broken many of theses during my projects. They have held up OK with some corrosion since 2018 when I bought the unit.
Instead of self drilling I am considering using self tapping. I have found grade 2 and grade 5 zinc plated and in Stainless 18-8 and 410 material. I know that 410 is stronger than 18-8 but less corrosion resistant. What I have not found is a comparison the the zinc plated steel. Also I have not found a comparison on the strength between the 4 materials. In other words is 410 stainless as strong as grade 5?
I guess what I am asking so I don't over engineer this is what would you folks recommend? I will probably need about 100 fasteners when all is said and done.
Thanks for any advice
Keith
Instead of self drilling I am considering using self tapping. I have found grade 2 and grade 5 zinc plated and in Stainless 18-8 and 410 material. I know that 410 is stronger than 18-8 but less corrosion resistant. What I have not found is a comparison the the zinc plated steel. Also I have not found a comparison on the strength between the 4 materials. In other words is 410 stainless as strong as grade 5?
I guess what I am asking so I don't over engineer this is what would you folks recommend? I will probably need about 100 fasteners when all is said and done.
Thanks for any advice
Keith
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