I bought a set of 24 1/2-20 chrome nuts and was having trouble installing one. After examining the union nut, I found that it was unthreaded. Luckily it only took me 20 to fit the wheels to my Jeep and the rest were replacement parts. Looking at other reviews this seems to be a recurring problem. The chain should get better quality control. Otherwise the wheel nuts appear to be of good quality. The time will show.