Threads / Size reference

M6x1 Metric coarse

M6x1 has a nominal outside diameter of 6 mm and a 1 mm pitch.

Nominal major diameter6 mm

0.23622 in

Pitch1 mm

25.4 TPI · calculated

Nominal dimensions; no class allowances or acceptance limits applied. M sizes state diameter and pitch in millimetres.

M6x1 · PITCH VIEWSCHEMATIC
PP = 1 mm

same diameter comparison

M6x1 vs M6x0.75

M6x0.75 Metric fine shares the nominal diameter but has a 0.750000 mm pitch. The pitch difference is 0.250000 mm; these are different nominal threads.

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Nominal size comparison
PropertyM6x1 Metric coarseM6x0.75 Metric fine
Nominal diameter · in0.236220.23622
Nominal diameter · mm66
Threads per inchDifferent25.433.866667
Pitch · mmDifferent10.75
Source chart available

Cutting-tap drill references

Cut taps · Guhring chart · PDF page 2
Target theoretical threadListed drillDiameter · in / mm
55%5.25 mm0.206693 / 5.25
65%13/64 in0.203125 / 5.159375
75%5.00 mm0.19685 / 5

Need acceptance limits?

The complete class and applicable drawing requirements are needed. These nominal values are not maximum/minimum inspection limits.

Part has no marking?

Measure the correct diameter and pitch, then compare candidates across metric and inch systems.

Basis for this size

Nominal designation and family transcribed from the live directory on 2026-10-19; unit conversions are calculated using exactly 25.4 mm/in. The drill row was read from Guhring PDF page 2; numbered and letter drill diameters use page 1. Paid standard limit tables have not been reviewed.

ISO 261 · metric general plan ↗ · Guhring · Tap Drill Sizes ↗ Full source scope →