Description
The Dormer A002 HSS TiN-Tip 25/64″ is a professional-grade, high-performance jobber length drill bit. This specific fractional size is highly valued in machine shops as the standard tap drill size for 7/16″-14 UNC threads. The 25/64″ (9.92mm) bit features Dormer’s flagship TiN-Tip technology. By applying a Titanium Nitride coating only to the working tip, the bit gains extreme surface hardness and heat resistance where it is needed most, while the High-Speed Steel (HSS) body remains flexible enough to resist snapping under torque.












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