This is a quick print to see how well your printer can print threads.

Ranges go down from M20 to M16 to M12 to M10 to M8 with an M6 to finish it up.

Print settings:

5% infill

2 perimeters

0.15 - 0.2mm layer height

All parts should thread into another without excessive force. Threads were modeled with fusion 360 and made to thread in nicely.