
Metric vs Inch Hex Bits for Small Precision Assemblies
For metric versus inch hex-bit selection, identify the fastener system and measure across flats before applying load. Verify nominal system, across-flat size, recess wear, bit markings, full depth, and rocking before turning. Stop when the system is unknown, the bit rocks, or corner wear is visible. Keep every screw mapped by position and follow the exact product or assembly instructions.
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