black oxide is used to provide a protective, corrosion resistant coating over metal. It has a uniform black finish that does not alter the dimensions ...United Plating Inc.
These are like the above ARP Studs, only these have a Black Oxide Finish and are made of 8740 chrome moly and have a very high tensile strength. ...proweldperformanceparts
It is a protective corrosion resistant coating over a base metal. The Oxide does not alter the dimension, physical or chemical properties of the ...Erie Protective Coatings, Inc.
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