METRICcoarse60° flank

M3 × 0.5 Thread Dimensions

M3 x 0.5 is a coarse pitch METRIC thread. Pitch is 0.5 mm, equivalent to 50.8 threads per inch. The recommended tap drill leaves roughly 75% thread engagement.

Nominal Ø3 mm
Pitch0.5 mm
Threads per inch50.8
Pitch Ø2.68 mm
Tap drill2.5 mm

Thread profile

millimetres unless stated
Thread profile — M3 x 0.5d 3d2 2.68d3 2.39mm60°P 0.5h3 0.31tap ⌀2.5
M3 × 0.5 — basic profile60° flank angle · Not to scale
Designation
M3 x 0.5
Thread system
METRIC
Series
coarse
Flank angle
60°
Major diameter
3 mm / 0.12"
Pitch
0.5 mm
Threads per inch
50.8
Pitch diameter
2.68 mm
Minor diameter (external)
2.39 mm
Minor diameter (internal)
2.46 mm
Thread depth
0.31 mm
Recommended tap drill
Ø 2.5 mm / 0.1"

How these values are derived

Basic ISO thread geometry uses the fundamental triangle height H = 0.866025 × P. External minor diameter d₃ = d − 1.226869 × P, internal minor diameter D₁ = d − 1.082532 × P. Tap drill is given as nominal diameter minus pitch, which approximates a 75% thread engagement — adjust for tough materials or deep holes.

Fasteners using this thread138 specification pages

All M3 fasteners
DIN 912ISO 4762DIN 7991ISO 10642ISO 7380DIN 7984DIN 916DIN 914DIN 915DIN 913ISO 4029DIN 84ISO 1207DIN 85ISO 1580DIN 963ISO 2009
SpecificationLength (mm)
DIN 912 M3 × 5 Hexagon Socket Head Cap Screw5
DIN 912 M3 × 6 Hexagon Socket Head Cap Screw6
DIN 912 M3 × 8 Hexagon Socket Head Cap Screw8
DIN 912 M3 × 10 Hexagon Socket Head Cap Screw10
DIN 912 M3 × 12 Hexagon Socket Head Cap Screw12
DIN 912 M3 × 16 Hexagon Socket Head Cap Screw16
DIN 912 M3 × 20 Hexagon Socket Head Cap Screw20
DIN 912 M3 × 25 Hexagon Socket Head Cap Screw25
DIN 912 M3 × 30 Hexagon Socket Head Cap Screw30
ISO 4762 M3 × 5 Hexagon Socket Head Cap Screw5
ISO 4762 M3 × 6 Hexagon Socket Head Cap Screw6
ISO 4762 M3 × 8 Hexagon Socket Head Cap Screw8
ISO 4762 M3 × 10 Hexagon Socket Head Cap Screw10
ISO 4762 M3 × 12 Hexagon Socket Head Cap Screw12
ISO 4762 M3 × 16 Hexagon Socket Head Cap Screw16
ISO 4762 M3 × 20 Hexagon Socket Head Cap Screw20
ISO 4762 M3 × 25 Hexagon Socket Head Cap Screw25
ISO 4762 M3 × 30 Hexagon Socket Head Cap Screw30
DIN 7991 M3 × 6 Hexagon Socket Countersunk Head Screw6
DIN 7991 M3 × 8 Hexagon Socket Countersunk Head Screw8
DIN 7991 M3 × 10 Hexagon Socket Countersunk Head Screw10
DIN 7991 M3 × 12 Hexagon Socket Countersunk Head Screw12
DIN 7991 M3 × 16 Hexagon Socket Countersunk Head Screw16
DIN 7991 M3 × 20 Hexagon Socket Countersunk Head Screw20
DIN 7991 M3 × 25 Hexagon Socket Countersunk Head Screw25
DIN 7991 M3 × 30 Hexagon Socket Countersunk Head Screw30
ISO 10642 M3 × 6 Hexagon Socket Countersunk Head Screw6
ISO 10642 M3 × 8 Hexagon Socket Countersunk Head Screw8
ISO 10642 M3 × 10 Hexagon Socket Countersunk Head Screw10
ISO 10642 M3 × 12 Hexagon Socket Countersunk Head Screw12
ISO 10642 M3 × 16 Hexagon Socket Countersunk Head Screw16
ISO 10642 M3 × 20 Hexagon Socket Countersunk Head Screw20
ISO 10642 M3 × 25 Hexagon Socket Countersunk Head Screw25
ISO 10642 M3 × 30 Hexagon Socket Countersunk Head Screw30
ISO 7380 M3 × 6 Hexagon Socket Button Head Screw6
ISO 7380 M3 × 8 Hexagon Socket Button Head Screw8
ISO 7380 M3 × 10 Hexagon Socket Button Head Screw10
ISO 7380 M3 × 12 Hexagon Socket Button Head Screw12
ISO 7380 M3 × 16 Hexagon Socket Button Head Screw16
ISO 7380 M3 × 20 Hexagon Socket Button Head Screw20

Showing the first 40 of 138 specification pages.