
I would caution anyone against buying these cage nuts, washers and bolts. Before my review, let me point out that I have been working with servers and data centers for many years. I've seen my fair share of good and bad quality hardware. Upon initial inspection, I noticed that the cage nuts were very thin and some were even unusable. Properly functioning cage nuts should be spring loaded but not prone to excessive deformation. The washers are plain plastic washers. They are very difficult to spoil; However, the inner diameter is a bit small to easily pass M6 screws. A good washer will have a little play after passing the M6 screw to ensure accuracy when installing without a stand. The biggest disappointment was definitely the screws. If only there were four words that could describe these screws. Bad design and materials! To be honest, I had a hard time figuring out if these screws were refurbished (rebuilt from an old data center) or just plain awful. Thing is, even rebuilt bolts can't be that bad. Many screws have poorly defined and cut heads that make it almost impossible to manipulate a screwdriver. They're also made from very poor quality materials (it looks pop metal to me) and will pop off with loads of torque. also look elsewhere.

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