DIN477 cover

DIN477 cover, works well for O2 bottles for EDS ... use the OpenSCAD source file to customize the text or other cover parameters (threads module needed), if needed:

vnitrek_prumer= inner diameter
delka_zavitu= the internal height of the thread
krytka=thickness of the top layer
sirka_matky=thickness of the cover side
sirka_boxu=thickness of the diagonal box