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Bolts · GB/T 5783 / ISO 4017

ISO 4017 Hex Bolt Dimensions

ISO 4017 Hex Bolt Dimensions reference image

ISO 4017 is the governing dimensional standard for hex bolt. This page sets out the scope of the standard, reproduces the full size table it specifies, and lists the DIN/ISO/ASME cross-references commonly cited in datasheets and drawings.

ISO 4017 — Scope

ISO 4017 specifies the dimensions and tolerances of hex bolt — gb/t 5783 / iso 4017 (series 010). 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 4017, alongside the related GB/T 5783 / ISO 4017 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 4017

SizePitch (mm)Nominal diameter d (mm)Length L (mm)Width across flats s (mm)Width across corners e (mm)Head height k (mm)
M30.53205.56.012.0
M40.74257.07.662.8
M50.85308.08.793.5
M61.064010.011.054.0
M81.2585013.014.385.3
M101.5106016.017.776.4
M121.75128018.020.037.5
M142.0148021.023.368.8
M162.01610024.026.7510.0
M182.51810027.030.1411.5
M202.52012030.033.5312.5
M243.02415036.039.9815.0
M303.53018046.050.8518.7
M364.03620055.060.7922.5

Equivalent Standards

ISO 4017 (full thread) corresponds closely to DIN 933; the partially-threaded variant ISO 4014 corresponds to DIN 931.

When to Specify ISO 4017

Choose ISO 4017 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for hex bolt — gb/t 5783 / iso 4017 (series 010).

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 5783 / ISO 4017)

SizePitch (mm)Nominal diameter d (mm)Length L (mm)Width across flats s (mm)Width across corners e (mm)Head height k (mm)
M30.53205.56.012.0
M40.74257.07.662.8
M50.85308.08.793.5
M61.064010.011.054.0
M81.2585013.014.385.3
M101.5106016.017.776.4
M121.75128018.020.037.5
M142.0148021.023.368.8
M162.01610024.026.7510.0
M182.51810027.030.1411.5
M202.52012030.033.5312.5
M243.02415036.039.9815.0
M303.53018046.050.8518.7
M364.03620055.060.7922.5

Frequently Asked Questions

Can I substitute ISO 4017 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 4017 last revise its dimensional table?

ISO standards for hex bolt — gb/t 5783 / iso 4017 (series 010) 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 4017 specify for Hex Bolt — GB/T 5783 / ISO 4017 (Series 010)?

ISO 4017 specifies the dimensions and tolerances of hex bolt — gb/t 5783 / iso 4017 (series 010). Material and property class are governed by separate standards in the same family.

What is the equivalent of ISO 4017 in DIN or ASME?

ISO 4017 (full thread) corresponds closely to DIN 933; the partially-threaded variant ISO 4014 corresponds to DIN 931.

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.