Screwing ply?

I dont do a lot of ply, and when I do I normally use ring shanks, I've got to ply a kitchen next week, max 6mm, customer wants it screwed down,for easy access under the floorboards if needed, any particular type of screw I should be using?
Thanks

 

what's going on top mate?

 

any counter sink wood screws is best.
avoid the black plasterboard screws like the plague

 

Texstar vinyl, perimeter fix, got a cordless impact driver.

 

Where do I get them, got a screwfix/b&q/wickes/homebase/toolstation within 1/2 mile?

 

Travis are doing bullett screws, they are pretty good

 

Reisler screws are preety good. Magnet trade or tool station sell em.

 

Spax mate there the bees .twin thread gets a proper grip

 

spas screws are good screwfix sell em

 

Spax all the time for me too...

 

These ones for 6mm ply?

http://www.screwfix.com/p/spax-single-thread-woodscrews-4-x-25mm-pack-of-200/32366

 

I wouldn't use 25mm mate as you will go through the chipboard / floorboards.

 

Old floorboards, so should be ok, but will get the 20mm to be safe.

 

Don't you mean 20 an 25 ?

 

The only reason I say it cause happened to me many moons ago. 25mm nails 6mm ply. Into a wire which blew up.
Screws go in more too so if you have

18mm floorboards 6mm ply then that's 24mm

25mm Screws go in 1-2mm which is approx 27mm so you are going under the boards around 3mm. The way sparks an plumbers work, always a risk!!

 

Arn't older floorboards around 25mm? know what you are saying though and will get the 20mm