I don't know what split washers are but those lock washers are nothing special. In addition, I don't know why they were used. Those lock washers only come in to play after a nut has backed off and there is little tension. At that point the bearing would not be functional.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!