Yet another knurling bolt and nut

There are yet another knurling bolts and a nut.
These has the curved surface made knurling.

"Yet another knurling bolt and nut" are compatible with "Knurling bolt and nut" (https://cults3d.com/en/3d-model/tool/knurling-bolt-and-nut).

Bolts are M16, pitch 2.0, length 20, 30, 40, 50, 60mm, A nut is M16, pitch 2.0, height 20mm.