Flat washer then smaller lock washer is what I do but then again on that area what was oem... bolt with flat washer.

Thanks guys, you have just killed a lifes long belief that lock washers that worked as named since ive never had a nut come off that had a good new lock washer on it.

Ive seen lockwashers that have lost there spring (went flat).

Now im questing everything in life.