I just wanted to tak the blade off and cap itYou want to totally remove the wiper drive spline? That requires motor removal.
Why not just remove the arm itself. Reinstall the retaining nut onto the spline so that you will know where it is.
Coat the spline with a little grease or anti-seize to prevent corrosion in case you want to reinstall it at a later date.
Google and ye shall find.I just wanted to take the blade off and cap it
If they make a cap
If you use a cap like that, I'd still advise coating the spline to prevent corrosion.friction fit caps are designed to protect threads and fittings from moisture, contamination and damage during production, shipping and storage.
The caps are non-threaded, which allows them to easily slide into place, and allows them to be removed with little effort as well.
Please choose the style of Friction Fit Cap that best suits your requirements.