GB/T 4389-2013
ActiveDouble-headed open-ended wrenches,double-headed box wrenches and combination wrenches - Maximum widths of heads
双头呆扳手、双头梅花扳手、两用扳手 头部外形的最大尺寸
Application Summary AI generated
This standard specifies the maximum head widths for double-headed open-ended wrenches, double-headed box wrenches, and combination wrenches. It is applied in the manufacturing and quality inspection of hand tools to ensure interchangeability and compatibility with fasteners in mechanical assembly and maintenance contexts.
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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.