Best posts made by Adrian Hidalgo

@Jhih-De-Wu have you also loaded the seeker platform files?

Typically, with a set of new props, they will have a very snug/tight fit. See pictures below:

@Steve-Sager I can answer the first question, Passivated 18-8 Stainless Steel Philips Flat Head Screw with an 82 Degree Countersink, 10-32 Thread, 1/2" Long, Undercut. You can find them at McMaster Carr: Here or any other hardware store. We also use a locknut to hold them in place, Steel Locknut with External-Tooth Lock Washer Zinc-Plated, 10-32 Thread Size here

@A-Evans You're welcome, glad I could be of assistance. You do have to tighten the nuts well, but not white knuckle tight. You will feel it tighten and then give it an extra little after that.
We have been trying to source any of the nuts but they are all out-of-stock. You can check any hobby store or Amazon. If you're trying to get the lock nuts, look for the aluminium ones. There's a lot of steel ones available. You're looking for M6's

@Syed-Omair the receiver should be on the bottom of the drone and you might have the R-XSR receiver instead of the X8R. It's smaller in profile, should look like something below. Bind button on the right corner next to the connector. Follow same binding procedures as the video.

@A-Evans the zip-lock bag has optional nuts if you wanted to mount the propellers using them instead of the conical nuts. You can use any of them.
The nylocks would be the first column to the left of the prop. They have the white nylon inside the nuts that prevent the nut from coming off. You will use a wrench or a socket to tighten these.
The second column of nuts furthest from the prop are non-locking nuts. No nylon here.
The conical nut, on the right side of the propeller, is another way to mount the propeller. No nylon here either. You will need some kind of rod to go through the hole to tighten down the nut.
You can use any of them.

The washer, all the way to the left will sit on-top of the propeller to spread the load out evenly on the propeller.

To answer your question about the insert washer for the prop, what color are your motors?
If they're blue then the propellers would come with a pack of inserts, usually on the prop bag, that have different fittings that will sit inside the prop itself. Choose the one that fits the shaft snugly. We would highly suggest that once you find the insert that fits well, apply some glue to the insert and put it into the prop. This'll prevent the insert from getting lost or getting stuck on the motor shaft.
If your motors are black, then no insert is needed. The shaft diameter was changed to allow the prop to fit without needing to use the insert.