Threads / Size reference

M12x1.75 Metric coarse

M12x1.75 has a nominal outside diameter of 12 mm and a 1.75 mm pitch.

Nominal major diameter12 mm

0.472441 in

Pitch1.75 mm

14.514286 TPI · calculated

Check tap-drill options →Compare M12x1.5 →

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

M12x1.75 · PITCH VIEWSCHEMATIC

same diameter comparison

M12x1.75 vs M12x1.5

M12x1.5 Metric fine shares the nominal diameter but has a 1.500000 mm pitch. The pitch difference is 0.250000 mm; these are different nominal threads.

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Nominal size comparison
Property	M12x1.75 Metric coarse	M12x1.5 Metric fine
Nominal diameter · in	0.472441	0.472441
Nominal diameter · mm	12	12
Threads per inchDifferent	14.514286	16.933333
Pitch · mmDifferent	1.75	1.5

All 3 options at this diameter

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Nominal thread sizes in this reference
Designation	Major Ø · in / mm	TPI	Pitch · mm	Drill evidence	Next step
M12x1.75 Metric coarse	0.472441 / 12	14.514286 converted	1.75	Chart row	Tap-drill lookup →
M12x1.25 Metric fine	0.472441 / 12	20.32 converted	1.25	Equation only	Tap-drill lookup →
M12x1.5 Metric fine	0.472441 / 12	16.933333 converted	1.5	Chart row	Tap-drill lookup →

Browse Metric coarse →

Source chart available

Cutting-tap drill references

Cut taps · Guhring chart · PDF page 2
Target theoretical thread	Listed drill	Diameter · in / mm
55%	27/64 in	0.421875 / 10.715625
65%	10.50 mm	0.413386 / 10.5
75%	10.30 mm	0.405512 / 10.3

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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 →