Hacker Newsnew | past | comments | ask | show | jobs | submitlogin

for metal screw threads and nuts I'm with you.

for other materials there has been more innovation later for threads, and for special uses of metal screws as well, for example self-tapping screws and coating of screws.

side question: why do you prefix years with a leading zero?

edit "long now", saw it in a sibling comment. TIL



Oh interesting! I didn't know that! What were the key innovations and when did they happen?


while I know they exist and I can point to an interesting collection I don't know the history of how they were invented and when:

https://www.celofixings.com/1663-self-tapping-and-self-drill...


Thanks! But this just seems to be an empty page with a cookie clickwrap extortion box on it?


this is what it says to me:

> Self-tapping and self-drilling screws

> CELO is leading the self-tapping and self-drilling screw market. > CELO's self-tapping and self-drilling screws offer the widest selection for installations of joining metals, PVC profiles and aluminium sheets.

> In this section you will find our screws in all sizes, recesses, head types and coatings.

and then pages over pages of a catalogue.

it was the first catalogue link searching for "self taping and self drilling screws"




Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: