03-03-2020, 08:57 PM
the self tapping screws i beleive are called pro-tech screws. they have a hexaganol nut head with a flat underneath.
we used the same thing.
they come with a seal washer, so no leaks get past.
hopefully you will be ok with .55 and you had put more battons underneath for more fixing screws.
tony
we used the same thing.
they come with a seal washer, so no leaks get past.
hopefully you will be ok with .55 and you had put more battons underneath for more fixing screws.
tony