English translation..., New Heavy-Duty F436 Structural Flat Washers made from Thru Hardened Zinc-Plated Medium Carbon steel. Plating is Zinc Yellow CR+6 (5 microns plating, Salt Spray Life 96 hours, white and red rust) for a durable finish.
Zinc-Yellow, CR+6 - Contains yellow pigment as an identifier. Coating thickness being the same, yellow chromate will have better corrosion resistance than clear chromate.
Note - 1/4" washer fits a 1/4" bolt. OD = Outside Diameter
