Jar lid 4 thread

Jar lid to fit (out of the box), 100mm (4 inch) diameter jar neck which has four 180 degree screw threads at 30mm (1 1/4 ") pitch or scale or rebuild to your requirement.

Supplied with the Blender pre-assembly file as a simple "learn Blender" project for you! To adapt the lid to your requirements, install Blender 3.80 (or later) and open the jar_lid_pre_join.blend file.
Select View | Front (or number [1] key on keypad).
The top object is the cutting tool comprising a 51.5mm diameter cylinder and 12 intersecting torus arcs for threads.
1. If required, adjust the torus arcs to your desired thread position and pitch
2. Mouse-click to select the Cylinder. In the tool window at the bottom-right select Modifiers | Add Modifier | Boolean. Select Torus 000 as the Object in the Modifier. Click [Apply] (see screen-shot). This will cut the shape of Torus 000 into the Cylinder.
3. Select Torus000 in the object tree (top-right), then right-click it and select Delete. This will reveal the th