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Nuts · ISO 4161 / DIN 6923

DIN 6923 Hex Flange Nuts

Hex Flange Nuts manufactured to DIN 6923 follow a specific scope. This page summarizes that scope, lists every dimension the standard fixes, and points to the most common cross-references.

DIN 6923 — Scope

DIN 6923 specifies the dimensions and tolerances of hex flange nuts. Material, property class, surface finish and packaging are governed by separate documents in the same standards family (for example ISO 898-1 for the mechanical property classes of bolts and screws).

Tolerance & Product Grades

DIN 6923, alongside the related ISO 4161 / DIN 6923 entries on this site, specifies product grades (typically A or B for fine work and C for general engineering) and tolerance classes for the controlling dimensions. Choose the grade against the precision your application requires.

Dimensions Specified by DIN 6923

SizePitch (mm)Flange diameter dc (mm)Nut height m (mm)Width across flats s (mm)Reference standard
M50.811.85.08.0ISO 4161 / DIN 6923
M61.014.26.010.0ISO 4161 / DIN 6923
M81.2517.98.013.0ISO 4161 / DIN 6923
M101.521.810.015.0ISO 4161 / DIN 6923
M121.7526.012.018.0ISO 4161 / DIN 6923
M142.029.914.021.0ISO 4161 / DIN 6923
M162.034.516.024.0ISO 4161 / DIN 6923
M202.542.820.030.0ISO 4161 / DIN 6923
M243.051.124.036.0ISO 4161 / DIN 6923

Equivalent Standards

Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Hex Flange Nuts page. Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.

Companion Standards

DIN 6923 controls only the geometry of hex flange nuts. The mechanical strength is set by ISO 898-1 (bolts and screws) or ISO 898-2 (nuts); the surface finish is governed by separate finish standards (e.g. ISO 4042 for electroplating). For corrosion testing, the relevant document is ISO 9227 (neutral salt spray).

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.

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Specification
Business Information

Dimensions & Specifications (ISO 4161 / DIN 6923)

SizePitch (mm)Flange diameter dc (mm)Nut height m (mm)Width across flats s (mm)Reference standard
M50.811.85.08.0ISO 4161 / DIN 6923
M61.014.26.010.0ISO 4161 / DIN 6923
M81.2517.98.013.0ISO 4161 / DIN 6923
M101.521.810.015.0ISO 4161 / DIN 6923
M121.7526.012.018.0ISO 4161 / DIN 6923
M142.029.914.021.0ISO 4161 / DIN 6923
M162.034.516.024.0ISO 4161 / DIN 6923
M202.542.820.030.0ISO 4161 / DIN 6923
M243.051.124.036.0ISO 4161 / DIN 6923

Frequently Asked Questions

Can I substitute DIN 6923 for the corresponding DIN standard on a drawing?

On modern drawings the ISO standard is the master reference; the older DIN equivalent is a cross-reference. For most dimensional purposes the parts are interchangeable, but check tolerance grades and the head height — these are the most common points of divergence.

When did DIN 6923 last revise its dimensional table?

ISO standards for hex flange nuts are reviewed on roughly a five-year cycle. Always reference the latest published edition (or the edition cited contractually); the dimensional table on this page reflects the current commercially-supplied form.

What does DIN 6923 specify for Hex Flange Nuts?

DIN 6923 specifies the dimensions and tolerances of hex flange nuts. Material and property class are governed by separate standards in the same family.

What product grades does DIN 6923 define?

DIN 6923 typically distinguishes product grades for precision (A/B) and general engineering (C). The selection for Hex Flange Nuts depends on the precision your application requires.

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.