On 17/05/2017 07:46, Graeme wrote:
8

My question is not about the difference between Philips and Pozi, or the
different sizes, but whether the GKN cross head is still standard, or
whether it was a one off unique to GKN, and now long gone. The screws
were around for years after GKN withdrew from the market, but supplies
have now all but disappeared.

I think they were a knock off of standard pozis.

If you want a better screw use torx head screws they are much better
than pozi.