this post was submitted on 12 Nov 2023
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[–] ForgotAboutDre@lemmy.world 23 points 2 years ago (3 children)

Hex should be B teir. Pozi should be C, it's very common in the UK for low torque applications. But it looks deceptively similar to Phillips.

[–] evranch@lemmy.ca 22 points 2 years ago (2 children)

Hex could even be A tier except...

  • 10 million metric sizes
  • 10 million imperial sizes
  • heads get full of rust or dirt
  • note that this makes it even harder to tell which damn size they are
  • usually mild steel so they strip, especially when it turns out you're using imperial in metric and vice versa

Too many years of wrenching on old equipment has soured me on all except for the good old fashioned hex bolt (S tier) and Robertson (A tier).

Even slotted beats most of these if the steel is decent, scrape out the rust and whack it with an impact screwdriver. I've turned many torx and hex in particular into slotted over the years.

[–] 1847953620@lemmy.world 2 points 2 years ago

what do you do?

[–] 7of9@startrek.website 2 points 2 years ago

There are not too many metric hex sizes.

There are too many imperial sizes, many of which have silly names.

Having cut the head off many rounded bolts I question your judgement.

[–] atmur@lemmy.world 6 points 2 years ago* (last edited 2 years ago) (1 children)

I could be talked into bumping Hex up to B, I just want it between Phillips and Robertson.

I don't have any experience with Pozi screws in the US, but doing a quick search they look like a solid upgrade over Phillips, so I'm guessing I would agree if I actually used them.

[–] ForgotAboutDre@lemmy.world 2 points 2 years ago

You get the self centering speed of Phillips with less cam out. It's standard for most construction style work, very useful when you need to do 100+ screws a day.

It can be a bit of a nightmare when you first start doing DIY. Because you may not recognise the difference between Pozi and Phillips. Both drivers will turn each screw, but the wrong driver will make cam out and stripping more likely.

[–] casmael@lemm.ee 3 points 2 years ago (2 children)

Pozidriv should be fucking banned oh my god why is it so common in the uk it’s so deeply inappropriate for 99.99% of applications

[–] ForgotAboutDre@lemmy.world 7 points 2 years ago* (last edited 2 years ago)

If you use the right driver and right size of driver. It's very good. In my experience it's much better than Phillips.

Torx, hex and Robertson are better, but they don't self centre. So if your doing a lot of screwing, pozi drive is king. Because it self centres, it's much faster. It's great for construction type work (decking, plasterboard, walls etc).

If your doing more fine work, or need to apply a lot of torque it's shouldn't be used. But very long/thick screws tend to be external hex, torx or combinations of these at Screwfix/Toolstation.

[–] Krzd@lemmy.world 3 points 2 years ago* (last edited 2 years ago)

Pozi is amazing for household applications where you don't need the torque of torx, and amazing for line work where screws won't be touched ever again (framing etc.)