The following applications of various thicknesses of coating are submitted for informative purposes only and are not to be construed as mandatory requirements in the use of this specification.

0.0003" (0.008mm) - for articles such as terminals which are to be soldered 0.0005" (0.013mm) - for corrosion protection of nonferrous basis metals 0.005-0.010" (0.013-0.25mm) - for electrical contacts, depending on pressure, friction and electrical load 0.0005" (0.013mm) - for increasing the electrical conduc- tivity of basis metals

For applications wherein corrosion protection is important, the use of an electrodeposited nickel undercoat will be advantageous.

Grade A silver plating with tarnish-resistant coating when produced using chromate-type supplementary dips have a low contact resistance in the order of 300 to 400 microhms per square inch (0.5 to 0.6 microhms per square mm). The items must be solderable with rosin cored solder.

The dimensional tolerance of most threaded articles, such as nuts, bolts, screws and similar fasteners with complimentary threads, normally does not permit the application of coating thickness much greater than 0.00015 inch (0.004 mm). The limitations of coating thickness on threaded fasteners imposed by dimensional tolerances (including class or fit) should be a subject for consideration wherever practicable, both by the manufacturer and the purchaser, to prevent the application of greater coating thicknesses than are generally permissible. If heavier coatings are required for satisfactory corrosion resistance, allowances must be made in the manufacture of threaded fasteners for the tolerance necessary for plate build-up.