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ISO 14581 M4

Countersunk head screw,hexalobular (Torx) drive

  • Thread M4 × 0.7
  • Torx bit T20
  • Tap drill Ø 3.3 mm

Dimensions and tolerances (mm)

ISO 14581 countersunk screw side view with the socket drawn dashed, showing d, P, dk, k, l and the socket depth tISO 14581 countersunk screw side view with the socket drawn dashed, showing d, P, dk, k, l and the socket depth t
Side view
ISO 14581 countersunk screw seen from the head, with the Torx socket width AISO 14581 countersunk screw seen from the head, with the Torx socket width A
Head view
minnom.max
d
dk
k
T
A
t

Values per ISO 14581:2013. The values follow this edition; the current one is ISO 14581:2022.

In bold: the value shown in the table on the standard page.

Work out the screw length you needOpens the bolted joint configurator with ISO 14581 M4 chosen.

Standard threads (mm)

Pd₂d₃
M4Coarse (most common)0.703.5453.141

Profile per ISO 68-1 · tolerance class 6g

Standard lengths (mm)

Length l measured from the top of the head.

568101214162025303540

All lengths of this size are fully threaded.

Verified data

We have checked this data against reliable sources.MechLab Geek accepts no liability for any use of this data or its consequences. Check it before you use it. Legal notice.Spotted a mistake? Let us know.

References

← All ISO 14581 sizes