Transistor heatsink shoulder washers

[lowell]

Hi can someone please tell me what those white plastic shoulder washers that insulate power transistors from the heatsink?

[52 Bill]

The shoulder washers really only insulate the metal case from the mounting screws. The mica insulator or silipad isolates the case from the heatsink.

Each size transistor case, TO-3, TO-220, etc. needs a different sized washer.

[lowell]

sorry should've been more clear.. I mean the shoulder washers that insulate the SCREWS from the transistor.

[Enzo]

What about them?

[lowell]

I was wondering what they're called so I could order some on digikey or mouser... but don't worry I found them under "insulating shoulder washers"

[Enzo]

They might also be found under "transistor mounting kit."

[lowell]

ok cool.