Question on CAD plated machine screws

[Flying High]

Just curious about something,

I ordered a bunch of AN526 machine screws from Spruce of various sizes for the Pitts and noticed that the new ones are shiny silver. My AN526 screws I bought locally are a dull charcoal grey colour.

Also noticed when installing them the new ones stick to the magnetic tip of my snap-on screw driver but the old ones don't.

Why is it so?

 

[Neil]

 

[Grasshopper22]

 

[Flying High]

 

[Beej]

 

[Grasshopper22]

 

[crankyklingon]