GB/T 4391-2008
ActiveDouble-ended wrenches - Size pairing
双头扳手 对边尺寸组配
Application Summary AI generated
GB/T 4391-2008 specifies the pairing of opposite-side dimensions for double-ended wrenches, ensuring that each wrench has two different-sized openings matched to standard fastener head sizes. It is applied in the manufacturing and quality control of hand tools, particularly for assembly and maintenance work in mechanical, automotive, and industrial equipment contexts. This standard facilitates efficient tool selection and interchangeability by defining size combinations that cover common nut and bolt dimensions.
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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.