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1.1 This guide is intended to provide a rapid, easy to use method for identifying Committee F16 fastener specifications and their applicable marking requirements. Selection is made by product type (bolts, nuts, washers, etc.) and material (alloy steel, carbon steel, stainless steel, etc.) from Tables 1-5 as follows:

Table Number Inch MetricFerrous Metals Alloy Steel13Carbon Steel13Weathering Steel1 3Non Ferrous Aluminum, CopperNickel, Titanium 2 3Stainless Steels 2 3 OthersCoatings, Definitions,Test Methods, Surface4 4Discontinuities Marking 5 5

1.2 Table size limitations and the need for simplicity prohibit identifying the exact grade, type, condition, etc., for all product/material combinations. The product specification must be reviewed prior to specifying fasteners on drawings or ordering to properly and completely identify the fastener, and its available variations.