Hey folks,

for my repair of a old Hameg HM605 oszilloscope i needed some 4 mm shaft couplers. The old ones broke apart and there is no online shop, where you can easily buy spare parts or similar plastic couplers. Thats why i remodeled the original couplers and printed them in ABS.

Tip: Print them horizontally and turn them by around 45 degree, that way it's pretty easy to print them with tree-supports enabled.