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IFI-166:2007
Inspection Procedure for Thread Nicks - Inch Series
This standard establishes an inspection procedure to determine acceptability of thread nicks as they relate to screw thread assemblability. This procedure is intended to be used for bolts, screws and studs of carbon or alloy steel #10 thru 1¬ inch in diameter. This procedure applies to Unified coarse and fine, Class 2A threads, plain finish and Class 2A threads that have been plated or coated. This procedure may also be used to evaluate Class 2A threads that have been undersized to allow for heavy plating/coating thickness and products made from nonferrous materials.
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Industrial Fasteners Institute [ifi]
Industrial Fasteners Institute [ifi]