Pentax P/K rear lens cap

Printed mine in PLA with a 0.4 mm nozzle, 0.16mm layer height, 25% infill, no supports. 

Depending on the accuracy of your machine you may need to slow down the printing speed a bit to accommodate for the finer details.

If you plan on moving it a lot or keep your lenses in sunlight try printing in PETG.

Simple rear lens cap for Pentax (P/)K-mount lenses. Inspired by the original caps but without the chamfered body to make printing more reliable. The hooks are chamfered so they grip more as you turn the lens just like the original caps. Feels study enough to properly ‘tighten’ the cap on, nice feedback. 

I don't have any long term tests of these caps but so far they are rock solid.