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Nuts · GB/T 39 / ISO 4034

M24 Square Nut, Metric Dimensions & Specifications

M24 Square Nut, Metric Dimensions & Specifications reference image

M24 Square Nut, Metric are manufactured to GB/T 39 / ISO 4034 with a coarse thread pitch of 3 mm. This page lists the controlling dimensions for the M24 size — head geometry, width across flats, matching spanner size — together with the clearance hole, tapping drill and tightening torque used at assembly.

M24 Dimensional Row (GB/T 39 / ISO 4034)

SizePitch (mm)Width across flats s (mm)Nut height m (mm)Reference standard
M243.036.014.0GB/T 39 / DIN 562

Spanner & Drive for M24 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)

Drive geometry for M24 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) is given by the row above; match the tool to the listed values.

Common Applications for M24 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)

M24 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) are commonly specified for structural joints, flange connections and heavy equipment foundations.

Installation Tips for M24 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)

  • At M24 the stretch in the bolt becomes the controlling factor — for critical joints, use angle-controlled or stretch-controlled tightening instead of pure torque.

Mating Parts for M24

Pair M24 with the matching M24 bolt or screw, plus a M24 flat washer where required to distribute load on softer materials.

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Sends the selected values to the quote form below.

Request a Quote

Adjust the parameters in the drawing above and click "Request this configuration" to send the exact specification straight to this form.

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Specification
Business Information

Dimensions & Specifications (GB/T 39 / ISO 4034)

SizePitch (mm)Width across flats s (mm)Nut height m (mm)Reference standard
M30.55.51.8GB/T 39 / DIN 562
M40.77.02.2GB/T 39 / DIN 562
M50.88.02.7GB/T 39 / DIN 562
M61.010.03.6GB/T 39 / DIN 562
M81.2513.04.8GB/T 39 / DIN 562
M101.517.06.0GB/T 39 / DIN 562
M121.7519.07.0GB/T 39 / DIN 562
M162.024.09.0GB/T 39 / DIN 562
M202.530.012.0GB/T 39 / DIN 562
M243.036.014.0GB/T 39 / DIN 562

Frequently Asked Questions

What clearance and tapping drill suit M24?

Use a 26 mm clearance hole (ISO 273 medium) for through-fixing, or a 21 mm tapping drill for a coarse M24 thread.

Should M24 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) be tightened by torque or by angle?

For critical structural joints at M24, angle-controlled or stretch-controlled tightening is more repeatable than pure torque — the friction scatter at large diameters can dominate the torque signal.

What grip range is typical for M24 structural bolts?

Grip ranges are highly application-dependent at M24. As a guide, choose a length that gives at least 1× the thread diameter engagement in the nut plus 2–3 thread pitches projecting.

What is the height of an M24 nut?

The nominal height of a style-1 ISO 4032 M24 nut is in the spec table on this page. Style-2 (thick) is approximately 1.1× this height; thin (ISO 4035 / DIN 439) is approximately 0.5×.

How do I request a quotation?

Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.