Links
Every Type of Plastic Used By LEGO
bricknerd.com
Modern Technic bricks with pins, such as 42929, are dual-molded so the brick part is ABS and the pin is PA (this is why they show up in BrickSet as “multicombination”, even though it’s the same color throughout).
TIL some LEGOs, despite looking uniform, are made of multiple types of plastic.