Screw cap
thingiverse
This is a simple screw cap. It is sized for a #6 pan head screw. https://cad.onshape.com/documents/3db758551084780c0493f0a3/w/d79c98e3d9b1c5f9e178904c/e/e81ff2d5fdae97731a4e8bed
Download Model from thingiverse
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