Recommended screw ?

[Arthur 51]

Hi. I will be fixing 22mm kronospan to heavy joists this weekend. I hate using the countersink bit so I want to try the self countersinking screws. What size and brand should I look for?

Thanks.

Arthur

[NT]

Which kronospan product? If its chipboard, vanilla 2" countersunk screws will countersink themselves no problem.

NT

[The Medway Handyman]

You need - IMO a screw three times the thickness of the material, so 66mm -

60mm in practice. I'd go for 4mm.

You simply cannot beat Screwfix Turbo Gold IMO.

[Arthur51]

Thanks. I found some 70mm x 4mm 'R2..' things at the local timber yard which worked easy peasy.

Arthur

[Rick Hughes]

Which kronospan product? If its chipboard, vanilla 2" countersunk screws will countersink themselves no problem.

I would not use standard wood screws on anything .... technology has evolved.

If it is chipboard then standard Goldscrews will self countersink. They will also drive in a lot easier.

Length should be 3 x thickness of material ... 65mm long or 70mm

so good choice would be 5 x 70

i.e: something like this from Screwfix product 16221

?_dyncharset=UTF-8&fh_search=16221if material is a bit harder than chipboard the use self countersinking heads .. screwfix 52972 ?_dyncharset=UTF-8&fh_search=52972

[NT]

genews:oWKvn.224980$ [e-mail]...

I dont think I've ever seen chp floor held down with 3" screws, but theyll work ok. Will just be more work to do.

NT

[NT]

ditto, I was thinking PB screws. Really any pointy coarse screw will work though.

NT