This standard is applicable to the types, names, appearance characteristics, minimum allowable limits and acceptance inspection methods of surface defects on nuts for which surface defects are general requirements (commercial quality).
1986GB 5779.2-1986 Surface discontinuities of fasteners on nuts for general requirements
GB 5779.2-1986 Surface discontinuities of fasteners on nuts for general requirements was changed to GB/T 5779.2-2000 Fasteners-Surface discontinuities-Nuts.