GB/T 70.3-2023
ActiveHexagon socket countersunk head screws with reduced loadability
降低承载能力內六角沉头螺钉
Application Summary AI generated
This standard specifies the dimensions, technical requirements, and marking for hexagon socket countersunk head screws designed with reduced loadability, meaning they have a deliberately weakened head or shank to fail under excessive torque. It is applied in mechanical assemblies where a controlled breakaway point is needed to prevent damage to more expensive components, such as in automotive, aerospace, or industrial machinery safety systems. The standard ensures these screws provide a predictable failure mode during overload, protecting critical parts from catastrophic failure.
Related Standards
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 62.2-2004
Wing nuts--Square wing
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 3098.20-2004
Mechanical properties of fasteners--Wing nuts with specified proof torque
GB/T 62.4-2004
Wing nuts--Die-casting wing
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.