METRICcoarse60° flank

M2 × 0.4 Thread Dimensions

M2 x 0.4 is a coarse pitch METRIC thread. Pitch is 0.4 mm, equivalent to 63.5 threads per inch. The recommended tap drill leaves roughly 75% thread engagement.

Nominal Ø2 mm
Pitch0.4 mm
Threads per inch63.5
Pitch Ø1.74 mm
Tap drill1.6 mm

Thread profile

millimetres unless stated
Thread profile — M2 x 0.4d 2d2 1.74d3 1.51mm60°P 0.4h3 0.25tap ⌀1.6
M2 × 0.4 — basic profile60° flank angle · Not to scale
Designation
M2 x 0.4
Thread system
METRIC
Series
coarse
Flank angle
60°
Major diameter
2 mm / 0.08"
Pitch
0.4 mm
Threads per inch
63.5
Pitch diameter
1.74 mm
Minor diameter (external)
1.51 mm
Minor diameter (internal)
1.57 mm
Thread depth
0.25 mm
Recommended tap drill
Ø 1.6 mm / 0.06"

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 thread58 specification pages

All M2 fasteners
DIN 912ISO 4762DIN 84ISO 1207DIN 85ISO 1580DIN 963ISO 2009
SpecificationLength (mm)
DIN 912 M2 × 4 Hexagon Socket Head Cap Screw4
DIN 912 M2 × 5 Hexagon Socket Head Cap Screw5
DIN 912 M2 × 6 Hexagon Socket Head Cap Screw6
DIN 912 M2 × 8 Hexagon Socket Head Cap Screw8
DIN 912 M2 × 10 Hexagon Socket Head Cap Screw10
DIN 912 M2 × 12 Hexagon Socket Head Cap Screw12
DIN 912 M2 × 16 Hexagon Socket Head Cap Screw16
DIN 912 M2 × 20 Hexagon Socket Head Cap Screw20
ISO 4762 M2 × 4 Hexagon Socket Head Cap Screw4
ISO 4762 M2 × 5 Hexagon Socket Head Cap Screw5
ISO 4762 M2 × 6 Hexagon Socket Head Cap Screw6
ISO 4762 M2 × 8 Hexagon Socket Head Cap Screw8
ISO 4762 M2 × 10 Hexagon Socket Head Cap Screw10
ISO 4762 M2 × 12 Hexagon Socket Head Cap Screw12
ISO 4762 M2 × 16 Hexagon Socket Head Cap Screw16
ISO 4762 M2 × 20 Hexagon Socket Head Cap Screw20
DIN 84 M2 × 4 Slotted Cheese Head Screw4
DIN 84 M2 × 5 Slotted Cheese Head Screw5
DIN 84 M2 × 6 Slotted Cheese Head Screw6
DIN 84 M2 × 8 Slotted Cheese Head Screw8
DIN 84 M2 × 10 Slotted Cheese Head Screw10
DIN 84 M2 × 12 Slotted Cheese Head Screw12
DIN 84 M2 × 16 Slotted Cheese Head Screw16
ISO 1207 M2 × 4 Slotted Cheese Head Screw — Product Grade A4
ISO 1207 M2 × 5 Slotted Cheese Head Screw — Product Grade A5
ISO 1207 M2 × 6 Slotted Cheese Head Screw — Product Grade A6
ISO 1207 M2 × 8 Slotted Cheese Head Screw — Product Grade A8
ISO 1207 M2 × 10 Slotted Cheese Head Screw — Product Grade A10
ISO 1207 M2 × 12 Slotted Cheese Head Screw — Product Grade A12
ISO 1207 M2 × 16 Slotted Cheese Head Screw — Product Grade A16
DIN 85 M2 × 4 Slotted Pan Head Screw4
DIN 85 M2 × 5 Slotted Pan Head Screw5
DIN 85 M2 × 6 Slotted Pan Head Screw6
DIN 85 M2 × 8 Slotted Pan Head Screw8
DIN 85 M2 × 10 Slotted Pan Head Screw10
DIN 85 M2 × 12 Slotted Pan Head Screw12
DIN 85 M2 × 16 Slotted Pan Head Screw16
ISO 1580 M2 × 4 Slotted Pan Head Screw — Product Grade A4
ISO 1580 M2 × 5 Slotted Pan Head Screw — Product Grade A5
ISO 1580 M2 × 6 Slotted Pan Head Screw — Product Grade A6

Showing the first 40 of 58 specification pages.