GB/T 31.2-2025
ActiveFasteners—Hexagon head bolts with split pin hole on shank—Part 2: Reduced shank—Product grade B
紧固件 六角头螺杆带孔螺栓 第2部分：细杆 B级
Application Summary AI generated
GB/T 31.2-2025 specifies hexagon head bolts with a reduced shank and a split pin hole, designed for applications requiring secure locking against rotation in mechanical assemblies. It is applied in general engineering, automotive, and machinery industries where product grade B tolerances are acceptable, such as in non-critical structural joints or equipment subject to vibration. The standard ensures compatibility with split pins for safety-critical fastening in contexts like agricultural machinery, construction equipment, or industrial transmission systems.
Related Standards
GB/T 9074.20-2004
Cross recessed hexagon head tapping screw with indentation and washer assemblies with plain washers
GB/T 62.3-2004
Wing nuts--Pressing wing
GB/T 62.2-2004
Wing nuts--Square wing
GB/T 9074.5-2004
Cross recessed small pan head screw andwasher assemblies with plain washers
GB/T 62.1-2004
Wing nuts--Round wing
GB/T 62.4-2004
Wing nuts--Die-casting wing
GB/T 3098.20-2004
Mechanical properties of fasteners--Wing nuts with specified proof torque
GB/T 3098.19-2004
Mechanical properties of fasteners--Blind rivets with break pull mandrel
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.