5.375" Wide Extruded Aluminum Heatsink

I got a custom cut heat sink. Great service product as described. Easy to order and good turn around. Good source for hobby projects like RF amplifiers.

I ordered a couple small pieces of the 5.375" heatsink for an amatuer radio project I am working on. The materials I received were cut to size perfectly and are of very high quality.

Bought 2 of these heatsinks 3 inches deep for a DIY amplifier build. They can quickly, maybe a week and a half, despite the COVID statement they have that certain industries will be prioritized over other orders, so I was happy about that. Came very well packaged, no threat at all that these beefy sinks would have been dented. As far as the sinks themselves, very well machined, identical to each other, no burrs or super sharp edges, seems like good base aluminum that they're working with in the first place. Price, product, and service have all been great, would definitely buy from again.

Arrived fast and extremely well packed

In general very good quality. Initial unit had considerable bow across width but this part was very quickly replaced by an acceptable heatsink.

Finally lots of fins and THICK base! 50W LED here we come!

Great to be able to find parts for our project locally but still be at reasonable prices (unfortunately harder and harder to do for a lot of things)!

Very glad I came across Heat Sink USA. Great product, great service, incredibly fast delivery.

The machining work did not meet specifications. While the extrusion is of good quality, I paid additional for an area to be machined flat. "Surface error (flatness) to equal or better than farside (flat side) of extrusion stock." Two of the five pieces have significant tooling marks which I hopefully can lap-finish flat. The other three - I will have to have re-machined because of the significant surface ripples left by the machinist.