Metric Screw Thread Dimension

invalid size
invalid pitch

Length of thread engagement

invalid LE

Ultimate tensile strength of material

invalid UTS

External pitch diameter tolerance

External major diameter tolerance

Internal pitch diameter tolerance

Internal minor diameter tolerance

Decimal places

Data not found

Tensile stress Area:

= 0 mm2

Tensile strength of externally threaded part:

= 0 kN

Minimum thread shear area for internal threads:

= 0 mm2

Minimum thread shear area for external threads:

= 0 mm2

Shear strength of internal threads:

= 0 kN

Shear strength of external threads:

= 0 kN

The tensile stress area is based upon the area at a section midway between the basic pitch diameter and the basic rounded form minor diameter with radius of 0.144P.

Thread shear areas are geometric minimum values. Shear (Thread Stripping) strength of screw threads under load are dependent, in addition, on mating component relative material strengths, nut geometry, and coefficient of friction between thread bearing surfaces. Effective shear areas are therefore somewhat less than the geometric values.

In general the length of engagement of mating threads is selected to utilize full tensile strength of a bolt prior to shearing of nut threads. Other applications may require internal thread shear prior to failure of the externally threaded part.

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