ASTM F 788/F 788M - 07 Standard Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series

American Society for Testing and Materials (ASTM). Current edition approved Nov. 15, 2007. Published December 2007. Originally approved in 1982. Last previous edition approved in 2006 as F 788/F 788M – 06. 6 p. This specification establishes allowable limits for the various types of surface discontinuities that may occur during the manufacture and processing of bolts, screws, and studs,
including heat-treated machine screws, tapping screws, and sems (the washers of screw-washer assemblies are excluded). This specification covers metric series products with nominal diameters of 4 mm and larger and with specified minimum tensile strengths of 420 MPa and higher; and inch series products with nominal diameters of No. 5 (0.1250 in.) and larger and with specified minimum tensile strengths of 60 000 psi and higher.