


More delivery methods in checkout
Return this item within 7 days of purchase.
Get an immediate answer with AI
AI-generated from the text of manufacturer documentation. To verify or get additional information, please contact customer service.
These little insulation washers from Aexit are essential if you're mounting TO-220 transistors to heat sinks.
They prevent electrical shorts between the transistor tab and the metal cooling fin, so your circuit stays safe and your components don't fry.
Each washer has a 3mm hole diameter and a 6.


You get 100 pieces in the pack, which is way more than you'll need for a single project, but handy to have around for future builds or repairs.


Installing them is simple—just slide one over the mounting screw or press it into the transistor mounting hole before attaching the screw to the heat sink.
If you're building or repairing power supplies, amplifiers, or any gear with TO-220 transistors, these washers are a must-have.

5 out of 5