that got your attention. lol. I have 10g Tek Head with neo washer screws to screw down my steel floor on the trailer (Ribbed steel, about 2mm thick). Question is what drill bit size do I need for a suitable pilot hole for the screws please? I don't understand the "10g" with screws/washers etc etc, and don't have a caliper handy to measure the screws themselves. Cheers
morrisjvan,
Nov 3, 4:23pm
10g = 10 gauge (std wire gauge) they are usually self drilling.
ambo11,
Nov 3, 4:30pm
Cheers for that, yep they do look as though they would cut their way in. better go find a suitable tek head driver bit tomorrow and see. thanks.
muzz67,
Nov 3, 4:42pm
I just use a drillbit the same size as the screws self-drill,.Much faster than grinding through with the screws drill.
skin1235,
Nov 3, 7:37pm
thats all good for the top sheet but don't drill right down through the member you are bolting it to those tec screws are designed to burr the hole and mushroom it on the underside so instead of the 3mm thickness of the member gripping the thread you actually end up with 5.5mm of thread to grip
mm12345,
Nov 4, 5:36pm
They come in various "qualities" too. I use a lot of them for metal to metal fixing, some of the crappy ones that have come supplied with hardware I've installed are awful to use, blunt and heads are slightly undersize so they'll flip out of the correct size driver bit when you apply force and because they're blunt they refuse to "bite" and slip. Buggers you up - either pre-drilling required, or throw them away and use decent screws.
richardmayes,
Nov 4, 6:02pm
The good ones are pretty good though - we built an apartment building that had rockwool cladding panels directly fixed onto the main steel columns with 300mm long self drilling tek screws put in from the outside, thru the panel and into the column.
Before Gibbing, the points of the screws were visible where they came through into the interior. still dead straight, totally unblemished and sharp pointed even after chewing their way through a 32mm thick steel column flange.
budgel,
Nov 22, 7:15pm
Have a think about whether or not you want to leave the washers on.
Since the public registrations are closed, you must have an invite from a current member to be able to register and post in this thread.
Have an account? Login here.