Arsonista
Member
- Messages
- 527
- Location
- Mid Wales
I bought some cast brass 'Mickey Mouse' wing nuts off ebay for a stove I'm making, they were 3/8 BSW. I found some old brass and made some studs for them and realised that I knew the angle of Whitworth threads was 55 deg. Now, I've never used this information in my working life, so, it must have been retained from Brooklands Tech some 35 ish years ago.
It started me thinking, I know Pi, some random tapping drill sizes and bend allowances will be with me 'til the grave, what other engineering info has everyone else got embedded in their brains. Or am I a bit sad.

