Parafusos de cabeça sextavada M42-4,5 x 320 mm | Aço liso classe 10.9 | Roscado parcialmente (1 un./embalagem)

The threads were clean and engaged perfectly with my existing nuts, saving me a lot of hassle. For the size and 10.9 grade, the price seemed very fair. These should hold up well for my applications.

Needed a couple of these for a heavy equipment jig I was building, and the 10.9 grade and partially threaded design were perfect for getting the clamping force I needed. The M42-4.5 thread engagement felt solid and secure, and the hex head allowed for easy tightening with a big wrench. Exactly what

Finally got these for a heavy machinery jig and the partially threaded shaft made alignment much easier than expected. The threading is clean and the hex head seated perfectly with a socket, no stripping even under decent torque.