METRICfine60° flankISO 262

M24 × 2 fine Thread Dimensions

M24 x 2 (fine) is a fine ISO Metric thread. Pitch is 2 mm, equivalent to 12.7 threads per inch. The recommended tap drill leaves roughly 75% thread engagement.

Major Ø24 mm
Pitch2 mm
Threads per inch12.7
Pitch Ø22.7 mm
Tap drill22 mm

Thread profile

millimetres unless stated
Thread profile — M24 x 2 (fine)d 24d2 22.7d3 21.55mm60°P 2h3 1.227tap ⌀22
M24 × 2 fine — basic profile60° flank angle · Not to scale

Basic information

Designation
M24 x 2 (fine)
Thread system
ISO Metric
Series
fine
Standard
ISO 262
Basic profile
ISO 68-1 basic profile
Flank angle
60°

Dimensions

Major diameter
24 mm
Pitch
2 mm
Threads per inch
12.7
Pitch diameter
22.7 mm
Minor diameter (external)
21.55 mm
Minor diameter (internal)
21.83 mm
Thread depth
1.227 mm
Recommended tap drill
Ø 22 mm

How these values are derived

computed from the basic profile

These figures follow the ISO 68-1 basic profile of ISO 262. A 60° basic profile uses a fundamental triangle height H = 0.866025 × P, with external minor diameter d₃ = d − 1.226869 × P and internal minor diameter D₁ = d − 1.082532 × P; the two differ because the external root is rounded while the internal crest is truncated. A 55° Whitworth profile uses H = 0.960491 × P and a thread height of 0.640327 × P. The recommended tap drill is given as nominal diameter minus pitch, which approximates 75% thread engagement — adjust it for tough materials or deep holes.

Compatible parts50 specification pages

All M24 fasteners

Every fastener below is threaded M24 × 2 fine, so a nut, bolt or washer picked from this list will mate with it.

DIN 912ISO 4762DIN 933ISO 4017DIN 931ISO 4014DIN 934ISO 4032DIN 439ISO 4035DIN 985ISO 10511
SpecificationLength
DIN 912 M24 × 40 Hexagon Socket Head Cap Screw40 mm
DIN 912 M24 × 50 Hexagon Socket Head Cap Screw50 mm
DIN 912 M24 × 60 Hexagon Socket Head Cap Screw60 mm
DIN 912 M24 × 80 Hexagon Socket Head Cap Screw80 mm
DIN 912 M24 × 100 Hexagon Socket Head Cap Screw100 mm
ISO 4762 M24 × 40 Hexagon Socket Head Cap Screw40 mm
ISO 4762 M24 × 50 Hexagon Socket Head Cap Screw50 mm
ISO 4762 M24 × 60 Hexagon Socket Head Cap Screw60 mm
ISO 4762 M24 × 80 Hexagon Socket Head Cap Screw80 mm
ISO 4762 M24 × 100 Hexagon Socket Head Cap Screw100 mm
DIN 933 M24 × 40 Hexagon Head Screw / Bolt — Full Thread40 mm
DIN 933 M24 × 50 Hexagon Head Screw / Bolt — Full Thread50 mm
DIN 933 M24 × 60 Hexagon Head Screw / Bolt — Full Thread60 mm
DIN 933 M24 × 70 Hexagon Head Screw / Bolt — Full Thread70 mm
DIN 933 M24 × 80 Hexagon Head Screw / Bolt — Full Thread80 mm
DIN 933 M24 × 100 Hexagon Head Screw / Bolt — Full Thread100 mm
DIN 933 M24 × 120 Hexagon Head Screw / Bolt — Full Thread120 mm
ISO 4017 M24 × 40 Hexagon Head Screw — Full Thread, Product Grade A/B40 mm
ISO 4017 M24 × 50 Hexagon Head Screw — Full Thread, Product Grade A/B50 mm
ISO 4017 M24 × 60 Hexagon Head Screw — Full Thread, Product Grade A/B60 mm
ISO 4017 M24 × 70 Hexagon Head Screw — Full Thread, Product Grade A/B70 mm
ISO 4017 M24 × 80 Hexagon Head Screw — Full Thread, Product Grade A/B80 mm
ISO 4017 M24 × 100 Hexagon Head Screw — Full Thread, Product Grade A/B100 mm
ISO 4017 M24 × 120 Hexagon Head Screw — Full Thread, Product Grade A/B120 mm
DIN 931 M24 × 50 Hexagon Head Bolt — Partial Thread50 mm
DIN 931 M24 × 60 Hexagon Head Bolt — Partial Thread60 mm
DIN 931 M24 × 70 Hexagon Head Bolt — Partial Thread70 mm
DIN 931 M24 × 80 Hexagon Head Bolt — Partial Thread80 mm
DIN 931 M24 × 100 Hexagon Head Bolt — Partial Thread100 mm
DIN 931 M24 × 120 Hexagon Head Bolt — Partial Thread120 mm
DIN 931 M24 × 140 Hexagon Head Bolt — Partial Thread140 mm
DIN 931 M24 × 160 Hexagon Head Bolt — Partial Thread160 mm
DIN 931 M24 × 180 Hexagon Head Bolt — Partial Thread180 mm
DIN 931 M24 × 200 Hexagon Head Bolt — Partial Thread200 mm
ISO 4014 M24 × 50 Hexagon Head Bolt — Partial Thread, Product Grade A/B50 mm
ISO 4014 M24 × 60 Hexagon Head Bolt — Partial Thread, Product Grade A/B60 mm
ISO 4014 M24 × 70 Hexagon Head Bolt — Partial Thread, Product Grade A/B70 mm
ISO 4014 M24 × 80 Hexagon Head Bolt — Partial Thread, Product Grade A/B80 mm
ISO 4014 M24 × 100 Hexagon Head Bolt — Partial Thread, Product Grade A/B100 mm
ISO 4014 M24 × 120 Hexagon Head Bolt — Partial Thread, Product Grade A/B120 mm

Showing the first 40 of 50 specification pages.

Related

Other pitches at the same 24 mm diameter — a fine pitch on a coarse diameter, or the reverse, is the usual substitution question.

M24 × 3

Neighbouring sizes in ISO Metric.

M20 × 2 fineM20 × 1.5 fineM22 × 2 fineM22 × 1.5 fineM27 × 2 fineM30 × 2 fineM33 × 3 fineM36 × 3 fine