GB/T 31.2-1988
AbolishedHexagon bolts with split pin hole on shank--Reduced shank--Product grade B
六角头螺杆带孔螺栓 细杆 B级
Application Summary AI generated
This standard specifies the dimensions, technical requirements, and marking of hexagon bolts with a split pin hole on a reduced shank, classified as product grade B. It is applied in mechanical assemblies where bolts require a locking mechanism via a split pin to prevent loosening under vibration, such as in automotive, agricultural machinery, and general engineering equipment. The reduced shank design allows for weight reduction and flexibility in applications where full thread engagement is not necessary.
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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.