Top tier post. My guess would be those are yellow zinc plated btw. Slightly more corrosion resistant.
https://dmsfasteners.com.au/blogs/fastening-solutions-expert-tips-for-all-your-project-needs/zinc-yellow-vs-zinc-plated-whats-the-difference
As in the... folk tale? Wikipedia
Top tier post. My guess would be those are yellow zinc plated btw. Slightly more corrosion resistant.
https://dmsfasteners.com.au/blogs/fastening-solutions-expert-tips-for-all-your-project-needs/zinc-yellow-vs-zinc-plated-whats-the-difference