Summary

This is a pen body for Pilot Parallel nibs. Its a bit shorter than the Pilot version and will let you post the pen cap. The threads for the nib are about 9.5mm x 0.75mm pitch x 10mm depth. The model might work on an FDM printer but the nib threads are fine and shallow so I printed using a resin printer. I had a fair amount of weirdness with this one that I think may be related to resin shrinkage. I suggest scaling based on resin shrinkage values. Attention needs to be paid to cleaning and curing the interior of pen body to prevent stickiness.