Best stainless screws for wood?
Trying to figure out the best self-tapping screws for wood and particle board - it has to be STAINLESS dome head or hex head.
Have already used sheet metal screws to install a solar panel. Will add another panel but suddenly started having some doubts.
There are no stainless "deck screws" - you know, those with thread similar to drywall screws - that would have dome head or hex head. When I look at "wood screws" in places like Home Depot, the thread looks identical to sheet metal screws only partially threaded, with un-threaded section of shank.
Searched McMasterCarr, they have stainless "serrated thread screws for plywood" - with size, length, and head that I want.
Q: What would you use to install on the roof something that is heavy and should also resist winds, using #10 screws, sometimes in 3/8" particle board, sometimes in rafters under particle board? Sheet metal screws again, or serrated threads, or... ?
(I'm not asking about the right number of anchor points VS wind force, solar panel height etc - let's not go there, the panel will be horizontal or with very little tilt).
PS:
RV manufacturer for all the exterior used a regular carbonized steel sheet metal screws, metric - don't ask me why metric, probably they got a box on cheap from an automotive supply place. Some heads are corroding already.
Have already used sheet metal screws to install a solar panel. Will add another panel but suddenly started having some doubts.
There are no stainless "deck screws" - you know, those with thread similar to drywall screws - that would have dome head or hex head. When I look at "wood screws" in places like Home Depot, the thread looks identical to sheet metal screws only partially threaded, with un-threaded section of shank.
Searched McMasterCarr, they have stainless "serrated thread screws for plywood" - with size, length, and head that I want.
Q: What would you use to install on the roof something that is heavy and should also resist winds, using #10 screws, sometimes in 3/8" particle board, sometimes in rafters under particle board? Sheet metal screws again, or serrated threads, or... ?
(I'm not asking about the right number of anchor points VS wind force, solar panel height etc - let's not go there, the panel will be horizontal or with very little tilt).
PS:
RV manufacturer for all the exterior used a regular carbonized steel sheet metal screws, metric - don't ask me why metric, probably they got a box on cheap from an automotive supply place. Some heads are corroding already.
