
I used this to add a usable filler plug to an old Bronco II rear diff. Drilled a hole in the detachable case, used some RTV and sealed it. Sand off part of the thread to make it finer.

Magnetic Oil Drain Plug Bolt With Gasket Washer Seal Included - PitVisit Reusable Aluminum Plug (M14 X 1.5, Silver) For Optimal Engine Maintenance
17 Review

Synthetic engine oil LUKOIL Lux synthetic SN/CF 5W-40, 1 l, 1 kg, 1 pc.
35 Review

Robot vacuum cleaner Roborock S7 with self-cleaning base RU, white
22 Review

10Mm Drain Hose For Easy Oil Changes By RuggedMade
34 Review