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SAE AS 1177B-2018
Nondestructive Inspection Standards for Bolts and Screws
To establish the acceptance criteria of surface discontinuities of bolts and screws. This acceptance criteria establishes the location, number, size, depth, and type of surface discontinuities that are permitted on bolts and screws as revealed by visual, magnetic particle, or fluorescent penetrant inspection.
Society of Automotive Engineers [sae]