GB/T 4260-2004
ActiveCounterbores with parallel shanks and solid pilots
带整体导柱的直柄平底锪钻
Application Summary AI generated
This standard specifies the dimensions, tolerances, and technical requirements for counterbores with parallel shanks and solid pilots. It is applied in the manufacturing industry for machining flat-bottomed recesses around existing holes in metal parts, ensuring precise seating for bolt heads, nuts, or washers. The standard is used by tool manufacturers and machinists to produce and select tools for consistent countersinking operations in mechanical assembly and fabrication.
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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.