These are model parts designed to replicate flange cap bolts, which in real machinery are used to secure components requiring high tightening torque. They are ideal for enhancing the mechanical detail of scale models.

To install, drill a hole matching the shaft diameter (0.5mm for 1mm and 1mm for 1.5mm/2mm) at the desired location and secure the part using CA adhesive or clear epoxy glue. These parts can also be attached after painting, effectively concealing the mounting holes and making fine color separation work easier.

If painting, first apply a metal primer, then finish with model paints.