FEOX-440 | مسامير تثبيت ذاتية اللولب PEM مقاس #4-40 | فولاذ (100/عبوة)

The steel construction feels solid, and the self-clinching action locked into my panel without deforming the metal. I used them for mounting a circuit board bracket, and all 100 studs seated flush in about an hour.

The 4-40 thread fits perfectly into my pre-tapped holes and the self-clinching design saved me a ton of time on a tricky panel assembly. The steel feels nice and sturdy, and they hold firm once tightened down. Exactly the kind of reliable hardware I was hoping for.

These are exactly what I needed for mounting brackets on a sheet metal chassis. The #4-40 threads cut cleanly and the steel finish seems durable enough for repeated assembly work.