METRICfine60° flankISO 262

M8 × 0.75 fine Thread Dimensions

M8 x 0.75 (fine) is a fine ISO Metric thread. Pitch is 0.75 mm, equivalent to 33.87 threads per inch. The recommended tap drill leaves roughly 75% thread engagement.

Major Ø8 mm
Pitch0.75 mm
Threads per inch33.87
Pitch Ø7.51 mm
Tap drill7.25 mm

Thread profile

millimetres unless stated
Thread profile — M8 x 0.75 (fine)d 8d2 7.51d3 7.08mm60°P 0.75h3 0.46tap ⌀7.25
M8 × 0.75 fine — basic profile60° flank angle · Not to scale

Basic information

Designation
M8 x 0.75 (fine)
Thread system
ISO Metric
Series
fine
Standard
ISO 262
Basic profile
ISO 68-1 basic profile
Flank angle
60°

Dimensions

Major diameter
8 mm
Pitch
0.75 mm
Threads per inch
33.87
Pitch diameter
7.51 mm
Minor diameter (external)
7.08 mm
Minor diameter (internal)
7.19 mm
Thread depth
0.46 mm
Recommended tap drill
Ø 7.25 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 parts226 specification pages

All M8 fasteners

Every fastener below is threaded M8 × 0.75 fine, so a nut, bolt or washer picked from this list will mate with it.

DIN 912ISO 4762DIN 7991ISO 10642ISO 7380DIN 7984DIN 933ISO 4017DIN 931ISO 4014DIN 934ISO 4032DIN 439ISO 4035DIN 985ISO 10511ISO 4161DIN 6923DIN 916DIN 914DIN 915DIN 913ISO 4029ISO 4027ISO 4028ISO 4026DIN 84ISO 1207DIN 85ISO 1580DIN 963ISO 2009
SpecificationLength
DIN 912 M8 × 12 Hexagon Socket Head Cap Screw12 mm
DIN 912 M8 × 16 Hexagon Socket Head Cap Screw16 mm
DIN 912 M8 × 20 Hexagon Socket Head Cap Screw20 mm
DIN 912 M8 × 25 Hexagon Socket Head Cap Screw25 mm
DIN 912 M8 × 30 Hexagon Socket Head Cap Screw30 mm
DIN 912 M8 × 35 Hexagon Socket Head Cap Screw35 mm
DIN 912 M8 × 40 Hexagon Socket Head Cap Screw40 mm
DIN 912 M8 × 50 Hexagon Socket Head Cap Screw50 mm
DIN 912 M8 × 60 Hexagon Socket Head Cap Screw60 mm
DIN 912 M8 × 80 Hexagon Socket Head Cap Screw80 mm
ISO 4762 M8 × 12 Hexagon Socket Head Cap Screw12 mm
ISO 4762 M8 × 16 Hexagon Socket Head Cap Screw16 mm
ISO 4762 M8 × 20 Hexagon Socket Head Cap Screw20 mm
ISO 4762 M8 × 25 Hexagon Socket Head Cap Screw25 mm
ISO 4762 M8 × 30 Hexagon Socket Head Cap Screw30 mm
ISO 4762 M8 × 35 Hexagon Socket Head Cap Screw35 mm
ISO 4762 M8 × 40 Hexagon Socket Head Cap Screw40 mm
ISO 4762 M8 × 50 Hexagon Socket Head Cap Screw50 mm
ISO 4762 M8 × 60 Hexagon Socket Head Cap Screw60 mm
ISO 4762 M8 × 80 Hexagon Socket Head Cap Screw80 mm
DIN 7991 M8 × 12 Hexagon Socket Countersunk Head Screw12 mm
DIN 7991 M8 × 16 Hexagon Socket Countersunk Head Screw16 mm
DIN 7991 M8 × 20 Hexagon Socket Countersunk Head Screw20 mm
DIN 7991 M8 × 25 Hexagon Socket Countersunk Head Screw25 mm
DIN 7991 M8 × 30 Hexagon Socket Countersunk Head Screw30 mm
DIN 7991 M8 × 35 Hexagon Socket Countersunk Head Screw35 mm
DIN 7991 M8 × 40 Hexagon Socket Countersunk Head Screw40 mm
DIN 7991 M8 × 50 Hexagon Socket Countersunk Head Screw50 mm
DIN 7991 M8 × 60 Hexagon Socket Countersunk Head Screw60 mm
DIN 7991 M8 × 80 Hexagon Socket Countersunk Head Screw80 mm
ISO 10642 M8 × 12 Hexagon Socket Countersunk Head Screw12 mm
ISO 10642 M8 × 16 Hexagon Socket Countersunk Head Screw16 mm
ISO 10642 M8 × 20 Hexagon Socket Countersunk Head Screw20 mm
ISO 10642 M8 × 25 Hexagon Socket Countersunk Head Screw25 mm
ISO 10642 M8 × 30 Hexagon Socket Countersunk Head Screw30 mm
ISO 10642 M8 × 35 Hexagon Socket Countersunk Head Screw35 mm
ISO 10642 M8 × 40 Hexagon Socket Countersunk Head Screw40 mm
ISO 10642 M8 × 50 Hexagon Socket Countersunk Head Screw50 mm
ISO 10642 M8 × 60 Hexagon Socket Countersunk Head Screw60 mm
ISO 10642 M8 × 80 Hexagon Socket Countersunk Head Screw80 mm

Showing the first 40 of 226 specification pages.

Related

Other pitches at the same 8 mm diameter — a fine pitch on a coarse diameter, or the reverse, is the usual substitution question.

M8 × 1.25M8 × 1 fine

Neighbouring sizes in ISO Metric.

M5 × 0.5 fineM6 × 0.75 fineM7 × 0.75 fineM8 × 1 fineM9 × 1 fineM10 × 1.25 fineM10 × 1 fineM11 × 1 fine