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Nuts · GB/T 6184 / ISO 7042

ISO 7042 All-Metal Prevailing Torque Hex Lock Nut (Type 1) — GB/T 6184 / ISO 7042 (Series 047)

For All-Metal Prevailing Torque Hex Lock Nut (Type 1) — GB/T 6184 / ISO 7042 (Series 047), ISO 7042 defines dimensions, tolerances and product grades. The sections below describe its scope, what it does NOT cover, and the equivalents across DIN, ISO and ASME.

ISO 7042 — Scope

ISO 7042 specifies the dimensions and tolerances of all-metal prevailing torque hex lock nut (type 1) — gb/t 6184 / iso 7042 (series 047). 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

ISO 7042, alongside the related GB/T 6184 / ISO 7042 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 ISO 7042

SizePitch (mm)Width across flats s (mm)Width across corners e (mm)Total height m (mm)Reference standard
M30.55.56.014.0ISO 7040 / DIN 985
M40.77.07.665.0ISO 7040 / DIN 985
M50.88.08.795.0ISO 7040 / DIN 985
M61.010.011.056.0ISO 7040 / DIN 985
M81.2513.014.388.0ISO 7040 / DIN 985
M101.516.017.7710.0ISO 7040 / DIN 985
M121.7518.020.0312.0ISO 7040 / DIN 985
M142.021.023.3614.0ISO 7040 / DIN 985
M162.024.026.7516.0ISO 7040 / DIN 985
M182.527.030.1418.0ISO 7040 / DIN 985
M202.530.033.5320.0ISO 7040 / DIN 985
M243.036.039.9822.0ISO 7040 / DIN 985
M303.546.050.8525.0ISO 7040 / DIN 985
M364.055.060.7929.0ISO 7040 / DIN 985

Equivalent Standards

Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent All-Metal Prevailing Torque Hex Lock Nut (Type 1) — GB/T 6184 / ISO 7042 (Series 047) page. Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.

When to Specify ISO 7042

Choose ISO 7042 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for all-metal prevailing torque hex lock nut (type 1) — gb/t 6184 / iso 7042 (series 047).

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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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 6184 / ISO 7042)

SizePitch (mm)Width across flats s (mm)Width across corners e (mm)Total height m (mm)Reference standard
M30.55.56.014.0ISO 7040 / DIN 985
M40.77.07.665.0ISO 7040 / DIN 985
M50.88.08.795.0ISO 7040 / DIN 985
M61.010.011.056.0ISO 7040 / DIN 985
M81.2513.014.388.0ISO 7040 / DIN 985
M101.516.017.7710.0ISO 7040 / DIN 985
M121.7518.020.0312.0ISO 7040 / DIN 985
M142.021.023.3614.0ISO 7040 / DIN 985
M162.024.026.7516.0ISO 7040 / DIN 985
M182.527.030.1418.0ISO 7040 / DIN 985
M202.530.033.5320.0ISO 7040 / DIN 985
M243.036.039.9822.0ISO 7040 / DIN 985
M303.546.050.8525.0ISO 7040 / DIN 985
M364.055.060.7929.0ISO 7040 / DIN 985

Frequently Asked Questions

Does ISO 7042 specify the mechanical strength?

No. ISO 7042 controls only the geometry of all-metal prevailing torque hex lock nut (type 1) — gb/t 6184 / iso 7042 (series 047). The mechanical strength is set by ISO 898-1 (bolts / screws) or ISO 898-2 (nuts), and the finish is governed by separate standards.

Can I substitute ISO 7042 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 ISO 7042 last revise its dimensional table?

ISO standards for all-metal prevailing torque hex lock nut (type 1) — gb/t 6184 / iso 7042 (series 047) 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 ISO 7042 specify for All-Metal Prevailing Torque Hex Lock Nut (Type 1) — GB/T 6184 / ISO 7042 (Series 047)?

ISO 7042 specifies the dimensions and tolerances of all-metal prevailing torque hex lock nut (type 1) — gb/t 6184 / iso 7042 (series 047). Material and property class are governed by separate standards in the same family.

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.