Jack Quality (Patreon)

For my project I am using very cheap jacks bought from aliexpress. The price is less than 10 cents per unit.

They work fine, but the quality of the threaded part of the nut is poor. The threads are small and cannot be tightened hard enough.

The picture above compares it to a jack I bought from tayda electronics. The quality did not change. The plastic parts have the same injection molding gate position, so they are probably made in the same factory.

The photo below is a comparison with a high quality jack (photo left side) that costs $0.5 per piece.

The quality of the threads is clearly different.