The radiator fixed back plate spring with spring screw is suitable for the upgrade heat sink of the Antminer S19 series and the miner heat sink of the T19 series, L7, D7, E9, and so on. The spring screw is made of high-quality carbon steel, which is anti-rust and anti-corrosion, and is not easy to be damaged; its thread is clear, the force is uniform, and it is not easy to slip. Mainly used to replace faulty, rusty, slipping radiator spring screws.