This photo was found on my HD, I can't give any credit, sorry.

[loke@functional.cafe]

@GustavinoBevilacqua Second row, second column doesn't look outright useless?

[gustavinobevilacqua@mastodon.cisti.org]

@loke

This one?

It looks like a screw for a 30° countersunk hole, which is the one with the most sense, for thick parts.

Sometimes I'd be happy to have screws like this one!

[strdst@chaos.social]

@n_dimension @GustavinoBevilacqua Some of them do look usable.

The tapered screw is just an NPT thread with a more aggressive angle for example

[jschwa1@mastodonapp.uk]

@GustavinoBevilacqua Brilliant! I have a paper diagram that contains all these gems, but have never seen a physical version before.

[adorfer@chaos.social]

@Nel @GustavinoBevilacqua
i use to order them from etel tuning.
https://etel-tuning.eu/kategorie/heimwerkerbedarf/sonderschrauben/

[mist@chaosfurs.social]

@GustavinoBevilacqua this feels very https://etel-tuning.eu/ (sadly only german)

[jschwa1@mastodonapp.uk]

@GustavinoBevilacqua Also have a scan of a really old spoof British Standard for Garden Gnomes. There is still gold out there to be found!!

[verity@kitty.town]

@GustavinoBevilacqua this is the real life equivalent of self sealing stem bolts!

[mohs@climatejustice.social]

@GustavinoBevilacqua this thing implies that there is a "screw or butt-plug" questionary somewhere.

[bodling@deacon.social]

@GustavinoBevilacqua I could use a couple of those

[gustavinobevilacqua@mastodon.cisti.org]

@Bodling

Yeah, some of them are smarter than they look.

[dereisenhofer@metalhead.club]

@GustavinoBevilacqua They get better and better!

[la@chaos.social]

@GustavinoBevilacqua I have an unreasonable and frankly unfortunate desire to replicate this.

[adventure_tense@mapstodon.space]

@GustavinoBevilacqua I believe we use a few of these at work. :-)

[thorsten4future@climatejustice.social]

@GustavinoBevilacqua Tahnks to #3Dprinting it's now so much easier to make these :)

#EngineeringIsFun

[danielakay@mastodon.cloud]

@GustavinoBevilacqua my brother and his fellow apprentices once found a phillips screw with no thread which they promptly deposited in the material room, just so they could send first-years to fetch a phillips nail.

This inspired them to spend several days on the attempt of bending a screw into a 90° angle, just for pranking first-years with an "angle screw" :-D

[gustavinobevilacqua@mastodon.cisti.org]

@danielaKay

To set a 90° screw you must make the hole with a 90° bit

[danielakay@mastodon.cloud]

@GustavinoBevilacqua but of course! :-D

Apparently their teachers didn't object to their screw extravagazas because it was quite obvious that they were learning a lot in the process :-D

[gustavinobevilacqua@mastodon.cisti.org]

@danielaKay

After all, experience is just the sum of a long line of errors (the trick is to remember them, to make new ones).

[ulriknyman@friendica.dk]

@GustavinoBevilacqua Also notice that it has not been counter sunk "too deep" but only "to deep".

So it is just right