metric comparison size · nominal diameter
1.6 mm
drill bit size.
A 1.6 mm bit measures 0.0630 in across (1.600 mm).
The metric diameter is the generated reference value; inches are a conversion. Commercial set contents vary.
1.6 mm · metric
Where this bit is specified
What 1.6 mm is for.
1.6 mm is the cutting-tap drill for the thread below— usually the reason this size gets looked up. Engagement is calculated from the basic 60° profile; open a thread for its published row, evidence, and limits.
Measured neighbors
What sits beside 1.6 mm.
“Nearest” means nominal diameter only. It does not make a neighboring size acceptable for a tolerance, tapping, reaming, or fastener application.
Source record
Drill Bit Size Chart.
A generated comparison series from 0.5 to 13.0 mm in 0.1 mm steps. It is not a claim that every size is included in every commercial set.
Open source record