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"What is the color of zinc?
Zinc is a bluish-silver, lustrous metal that tarnishes in moist air, producing a layer of carbonate. It is somewhat brittle at room temperature but malleable above 100oC. It is a fair conductor of electricity, and burns in air with a bright bluish-green flame producing white clouds of the oxide."
So says Mr. Google.
Last edited by Terry Nuckels

The color of dirty, dusty grease.

The originals, were black chromate (because it seems that the Germans were as OCD as you).  The chromating only offered a tiny bit of rust protection (this was the 1950's, after all) but was better than nothing and did not interfere with the threads.  They were also the same as VW lug bolts.

When people ran chrome wheels, they still had dark lug bolts

They looked cool, too.

Last edited by Gordon Nichols
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