This range covers Kia, Mazda, Nissan and Volvo applications by OEM part number.
Fasteners are specified, not generic. A washer that looks ordinary may be a hardened load-spreading washer under an aluminium component; a nut may be a prevailing torque type that will not vibrate free; a retaining ring may be the only thing stopping a shaft from walking out of a bearing. Substituting a hardware-store part removes a design feature nobody notices until it fails.
Replace fasteners whenever they are removed from a torque-to-yield or a locking application, when the threads are stretched or burred, when a washer has been crushed or dished, or when a retaining ring has lost its tension. Reusing a distorted washer concentrates load on one edge of a joint.
Listings give the thread size, the model years and the OEM number. Where a fastener is a specific grade or a locking type, that is noted in the description.