On 8/22/2015 8:49 AM, John McCoy wrote:
Leon lcb11211@swbelldotnet wrote in
:

Not saying to use deck screws but, I see that Spax cabinet screws use
a "T-Star Drive". Is that the same as Torx? I know that there is a
drive that looks like a torx but not exactly, like square drive and
Robertson drive. Could you possibly be using the wrong bit? I know
you said you used the one that came with it.

According to Spax, they use a "T-Star Plus" head. T-Star Plus
is apparently the same as "Torx Plus". According to Texron
(who developed Torx) the Torx Plus bit allows more torque. It's
also a tad larger than standard Torx, so a regular Torx bit will
fit a Torx Plus screw, but poorly.

This seems to me to be an unfortunate attempt by Texron to
confuse the market. Now we have two slightly different Torx
drivers that sort of work but aren't really compatible. Much
like the dozen different variations on Phillips (and the
tendency of cheap drivers to not exactly match any of the
specifications).

FWIW, I have always heard that "square drive" and "Robertson"
are exactly the same. The square drive name is used in the US
because of some legal thing about the trademarking of the name
Robertson in Canada.


Actually Square Drive And Robertson are not the same. The Robertson
drive is tapered slightly toward the point of the bit. The Robertson
holds the screw better. Square drive is not. But like we all know you
can make either work just like the multiple designs of Phillips like screws.