Specifies the characteristics of products with metric dimensions and thread diameters from 3 mm up to and including 20 mm; includes specifications with reference to International Standards; gives an example for the designation.
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Industrial Fasteners Institute
IFI represents North American fastener manufacturers to their suppliers, customers, the government, and the public at large to advance the competitiveness, products, and innovative technology of the IFI Member Companies in a global marketplace.
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