A Guide to Metric Fastener Plating

Mr. Metric’s Custom Services for Metric Fasteners

You may have noticed that Mr. Metric offers plating among its other custom services for its clients. This means you can choose from a plethora of zinc, cadmium, gold, nickel, chrome and other finishes for your metric bolts, metric washers and metric nuts. But why does the choice of plating matter — and how do you know what kind of plating to select?Metric Socket Screw Steel Grade 8.8 Zinc

Plating is simply covering a conductive surface with a metallic coating, such as hot-dip galvanization to coat a steel fastener with a layer of zinc, or electroplating to add a layer of cadmium or chromium. We do this to take advantage of some desirable characteristic in the plating material. Sometimes that characteristic is purely cosmetic. If you want a bright, shiny look to your screw heads, get them plated in chrome. If you want black fasteners without having to paint them, order them in black zinc.

More often than not, however, we plate fasteners for a functional reason. Plating can guard against chemical corrosion and/or physical wear, depending on what material you select. Phosphate plating, for instance, does an excellent job against physical wear but is only so-so for preventing corrosion, while zinc or cadmium dichromate primarily prevents corrosion. Chrome fits somewhere in the middle — pretty good against corrosion, more wear-resistant than zinc. If your products will be used in an aquatic environment, you may want to consider electroplated cadmium, which does a particularly good job against water corrosion.

Once you’ve determined what kind of protection and appearance you want for your fasteners, contact Mr. Metric or request a quote and we will be happy to plate your order with the appropriate material. And if you can’t quite make up your mind which plating you need, contact us and let’s discuss it.

About the author

Mr. Metric is the spokesperson for www.mrmetric.com, an online store for metric fasteners. Get $7.50 flat shipping with no minimum orders, plus advice and best practices for using metric fasteners in any application.

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