1 Introduction
This standard specifies the hexagon head bolts with thread size of M3~M20, reduced shank and of product grade B.
This standard is identical to “Hexagon Head Bolts-Product Grade B-Reduced Shank(Shank Diameter ≈ Pitch Diameter)” (ISO 4015-1979).
2 Normative References
GB 196-81 “General Purpose Screw Threads-Basic Dimensions for Diameter from 1 to 600mm”;
GB 197-81 “General Purpose Screw Threads-Tolerances and Fits for Diameter from 1 to 355mm”;
GB 2-85 “Fasteners-Ends of Parts with External Thread”;
GB 3098.1-82 “Mechanical Properties of Fasteners-Bolts, Screws and Studs”;
GB 3098.6-86 “Mechanical Properties of Fasteners-Stainless Steel Bolts, Screw and Nuts”;
GB 3103.1-82 “Tolerances for Fasteners-Bolts, Screws and Nuts”;
GB 5267-85 “ Electroplated Coatings on Threaded Fasteners”;
GB 5779.1-86 “Surface Discontinuities of Fasteners on bolts, Screws and Studs for General Requirements”;
GB 90-85 “Acceptance Inspection, Marking and Packaging of Fasteners”
