this post was submitted on 07 Oct 2025
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[–] TrickDacy@lemmy.world 23 points 4 days ago (4 children)

What is labelled "flat" here I've only ever heard of as "countersunk" and what's labelled as "slotted" I've only ever heard of as "flat head". Also wtf is "PF"?

[–] MystikIncarnate@lemmy.ca 17 points 4 days ago (1 children)
[–] melsaskca@lemmy.ca 0 points 4 days ago (3 children)

I thought, for some reason, that Robertson was ostracized from the screw world.

[–] JoeBigelow@lemmy.ca 9 points 4 days ago

Best drive going hands down. I don't need a deliberate tourqe out to save my driver, I'm a big boy. Plus it usually just breaks the screw

Yeah screw Robertson

[–] MystikIncarnate@lemmy.ca 4 points 4 days ago* (last edited 4 days ago) (1 children)

In the USA maybe.

Everywhere else it's pretty common.

[–] Amuletta@lemmy.ca 6 points 4 days ago (1 children)

Fun fact, Henry Ford wanted to use them on his cars, but tried to screw Robertson in the deal. His petulance is the reason that Americans can't benefit from this perfect design.

[–] MystikIncarnate@lemmy.ca 5 points 4 days ago

I knew there was some reason for it, but I couldn't get my brain to remember what it was; but this sounds familiar.

[–] Bluewing@lemmy.world 3 points 3 days ago (1 children)

PF = Plastic thread Forming. They are basically a self-tapping screw meant for plastics.

[–] TrickDacy@lemmy.world 1 points 3 days ago

ah ok neat. Thanks!

[–] WolfLink@sh.itjust.works 6 points 4 days ago

I had the same thought! Also I’ve only ever heard “torx” instead of “six lobe” although I’m guessing torx is a brand name.

[–] mrgoosmoos@lemmy.ca 1 points 4 days ago (1 children)

damn your area uses dumb names for things then lol

calling a drive type by the head shape, that's wild

[–] TrickDacy@lemmy.world 3 points 4 days ago (1 children)

Thanks -- little known fact, I time traveled to a hundred years ago to invent these terms.