Review on POWERTEC QLN1200 Serrated Premium Fasteners by Tim Roby

I was surprised to see them at such a low price and thought I might not be able to get quality nuts. I had to use these for Yinlong batteries and compared to buying from a reputable manufacturer which would cost over $1 each I decided to use them for $10 for $25. To my surprise, they worked as they should! The threads are a snug fit on each nut and the quality of the metal is superb. Although I didn't tighten the batteries more than 7Nm due to the torque characteristics of the batteries, they had no trouble removing them. These lock nuts are as advertised and I would definitely recommend them.