M12 × 1.75 M profile External Thread Specifications

M12x1.75-6g

ASMESTD: ASME B1.13MSOURCE: Table 14 · p. 27TYPE: External (bolt/screw)CLASS: 6gSERIES: M coarse (Table 4)1st choice (Table 6, p. 9) · standard size

Major diameter

11.966 – 11.701

max – min

Pitch diameter

10.829 – 10.679

max – min

Minor diameter

10.071 – 9.601

max – min (min is a reference value)

Fundamental deviation

es −0.034

pitch 1.75 mm · position g

Thread profile

M12x1.75-6g: solid line = maximum material profile, dashed = minimum material, hatched = tolerance zone (Figs. 8 and 9), grey dashed = basic profile (Fig. 1). Drawn to scale; values in mm, diameters shortened.

Limits of size, class 6g

Dimension	Basic	Max	Min	Tolerance
Major diameter dOutside diameter over the crests	12.000	11.966	11.701	0.265
Pitch diameter d2Where thread and groove widths are equal; sets the fit	10.863	10.829	10.679	0.150
Minor diameter, flat root d1Max d1 (flat form); min = d3 of the rounded form, for reference	10.106	10.071	9.601ref.	0.470ref.
Rounded-form minor diameter d3d3 max and d3 min; used for tools and gaging		10.027ref.	9.601ref.
Deviations, pitch diameter es / eiUpper and lower deviation from the basic pitch diameter (Fig. 4)	—	−0.034	−0.184	—
Deviations, major diameter es / eiCrest diameter	—	−0.034	−0.299	—

Dimensions in millimetres. Values are those of the standard (ASME B1.13M); calculated cells follow the standard’s formulas. Where the standard prints a value that differs from its formula, the printed value is shown with a note.

Tolerance zones relative to the basic size, mm (Fig. 4)

Lead, flank angle and length of engagement

Allowable lead variation ±δP: 0.043 mmOver the length of engagement
Equivalent change in functional diameter δd2: 0.075 mmHalf the pitch diameter tolerance
Allowable half-angle variation ±δα: 1° 35′ Each 30° flank angle
Length of engagement, normal LE: 6.0 – 18.0 mmShort up to / long over: see all values

Notes

App. C Table C-1 (p. 55) prints pd min 0.42023 in.; 10.679/25.4 = 0.42043. Normal tolerance, small allowance (para 5.5.1(a)); the usual bolt class, ~ inch 2A.

Mates

M12x1.75-6g screws into a thread of the same standard at the same size and pitch. The standard mating internal thread is class 6H. Check the fit with the standard pair →

Working out the mating options…

Different pitch or a different thread family never mate; the fit check runs over both tolerance zones.

Related thread sizes

Same diameter other pitch, and neighbouring sizes

→ M12 × 1 mm → M12 × 1.25 mm → M12 × 1.5 mm → M11 × 1.5 mm → M14 × 1 mm → M12 × 1.75 internal → ISO metric M12x1.75 external

All values for M12x1.75-6gevery column of the workbook row

All values of the workbook row M12x1.75-6g
Designation	M12x1.75-6g
Alternate designation (all capitals, para 7.2.3)	M12X1.75-6G EXT
Pitch in designation	1.75
Thread form	M
Series	Coarse
Series name	Standard coarse pitch series (Table 4)
External / internal	External
Class	6g
Nominal size	M12
Pitch P (mm)	1.75
Basic major dia D, d (mm)	12.000
Size category	1st choice (Table 6, p. 9) · standard size
Source table	Table 14
Printed page	27
Thread type	M coarse (Table 4)
Tolerance position, pitch dia	g
Tolerance grade, pitch dia	6
Tolerance position, crest dia	g
Tolerance grade, crest dia	6
Fundamental deviation es / EI, pitch dia (mm)	-0.034
Fundamental deviation es / EI, crest dia (mm)	-0.034
Allowance \|es\| / EI (mm)	0.034
Major dia max (mm)	11.966
Major dia min (mm)	11.701
Major dia tolerance Td (mm)	0.265
Major dia status	Toleranced (d max, d min)
Basic pitch dia D2, d2 (mm)	10.863
Pitch dia max (mm)	10.829
Pitch dia min (mm)	10.679
PD tolerance Td2 / TD2 (mm)	0.150
Basic minor dia D1, d1 (mm)	10.106
Minor dia max (mm)	10.071
Minor dia min (mm)	9.601
Minor dia tolerance TD1 (mm)	0.470
Minor dia status	d1 max toleranced (flat form, para 9.3.2(e)); min is d3 min of the rounded form, for reference (Table 14 note 4)
Max minor dia, flat form d1 (mm)	10.071
Min minor dia, rounded form d3 (mm, reference)	9.601
Max minor dia, rounded form d3, para 9.3.2(f) (mm)	10.027
Upper deviation, pitch dia es / ES (mm)	-0.034
Lower deviation, pitch dia ei / EI (mm)	-0.184
Upper deviation, crest dia (mm)	-0.034
Lower deviation, crest dia (mm)	-0.299
LE short, up to (mm)	6.0
LE normal, over (mm)	6.0
LE normal, up to and incl. (mm)	18.0
LE long, over (mm)	18.0
LE source	Table 7
Lead variation ± (mm)	0.043
Equivalent change in functional dia (mm)	0.075
Lead values source	Table 17, p. 47
Half-angle variation ±	1° 35′
Half-angle source	Table 18
Lead angle at basic PD (deg)	2.9355
Lead angle (deg min)	2° 56′
Tensile stress area As (mm²)	84.267
Thread angle (deg)	60
Flank angle (deg)	30
Sharp V height H (mm)	1.515544
Thread height h = 5H/8 (mm)	0.947215
Crest flat (mm)	0.218750
Root flat (mm)	0.437500
Sweep cut: start diameter (mm)	11.966000
Sweep cut: tip diameter (mm)	10.071000
Sweep cut: depth (mm)	0.947500
Sweep cut: profile width at start diameter (mm)	1.531250
Crest flat as modelled (mm)	0.218553
Inch (App. C): allowance (in.)	0.00134
Inch (App. C): major dia max (in.)	0.47110
Inch (App. C): major dia min (in.)	0.46067
Inch (App. C): pitch dia max (in.)	0.42634
Inch (App. C): pitch dia min (in.)	0.42023
Inch (App. C): PD tolerance (in.)	0.00591
Inch (App. C): minor dia max (in.)	0.39650
Inch (App. C): d3 min / D max, reference (in.)	0.37799
Inch (App. C): pitch (in.)	0.06890
Inch (App. C): printed page	55
Check against formulas	OK: all 8 printed Table 14 values agree with the formulas. App. C pd_min printed 0.42023, conversion 0.42043
Notes	App. C Table C-1 (p. 55) prints pd min 0.42023 in.; 10.679/25.4 = 0.42043. Normal tolerance, small allowance (para 5.5.1(a)); the usual bolt class, ~ inch 2A.

ASME B1.13M: Metric Screw Threads: M Profile. Source: workbook data (2026-10-10). Confirm against your licensed copy of the standard before use.