This page presents the complete DIN 931 dimensional standard as used by Ananka Fasteners Pvt Ltd across our fastener catalogue. Metric hex bolt with partial (shank) thread, ISO metric coarse, in the size range M6 to M100. Used where the plain shank locates in a reamed hole and the thread is engaged only in the mating nut. The dimension table below reflects the values manufactured to at Ananka in every grade we stock.
Metric hex bolt with partial (shank) thread, ISO metric coarse, in the size range M6 to M100. Used where the plain shank locates in a reamed hole and the thread is engaged only in the mating nut.
| Standard | DIN 931 | Family | DIN |
| Units | Metric | Nominal Size Range | M6 – M100 |
| Thread Standard | ISO 261 metric coarse | Fastener Types Covered at Ananka | Hex Bolt (Partial Thread) |
| Grades Available | 79 (Nickel 200 through Zeron 100 – see Section 4) | Related Standards | ISO 4014 |
The DIN 931 specification governs the physical geometry of this product. The tolerances below ensure a secure, reliable mate under service loads. DIN 931 covers partially threaded hex bolts (shank plus thread).
| Nominal Thread (d) | Pitch (mm) | Width Across Flats s (mm) | Width Across Corners e (min, mm) | Head Height k (mm) |
|---|---|---|---|---|
| M6 | 1.0 | 10.00 | 11.05 | 4.0 |
| M8 | 1.25 | 13.00 | 14.38 | 5.3 |
| M10 | 1.5 | 16.00 | 17.77 | 6.4 |
| M12 | 1.75 | 18.00 | 20.03 | 7.5 |
| M16 | 2.0 | 24.00 | 26.75 | 10.0 |
| M20 | 2.5 | 30.00 | 33.53 | 12.5 |
| M24 | 3.0 | 36.00 | 39.98 | 15.0 |
| M30 | 3.5 | 46.00 | 50.85 | 18.7 |
| M36 | 4.0 | 55.00 | 60.79 | 22.5 |
At Ananka, the following fastener geometries are produced to DIN 931:
Every grade in the Ananka catalogue is available in this dimensional standard:
Threads are cut to ISO 261 metric coarse. Standard tolerance class is 6g (external) / 6H (internal) for metric, or Class 2A/3A for inch series. Fine-thread and interference-fit variants are available on request.
Every fastener produced to DIN 931 undergoes 100% dimensional inspection with calibrated gauges. Traceability is maintained from mill certificate to shipment.
For technical documentation and quotations, buyers can also review the Ananka Fasteners manufacturing and supply range or contact the team through the fastener enquiry and technical support page.
This datasheet references DIN 931 for dimensional requirements. The applicable standard edition and purchase requirements should be confirmed for every project.
For DIN standards information, see the DIN standards catalogue. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
Metric hex bolt with partial (shank) thread, ISO metric coarse, in the size range M6 to M100. Used where the plain shank locates in a reamed hole and the thread is engaged only in the mating nut.
DIN 931 is manufactured by Ananka in Hex Bolt (Partial Thread), across a M6 – M100 size range.
Ananka Fasteners manufactures Hex Bolt (Partial Thread) to DIN 931. See the Fastener Types table above for the full list.
Threads are cut to ISO 261 metric coarse. See Section 5 above for the tolerance class.
79 (Nickel 200 through Zeron 100 – see Section 4) available in this dimensional standard. See Section 4 above for the full grade list.
Yes. For a quotation, provide the required nominal size, material grade, quantity and any inspection or certificate requirements.
Need a fastener manufactured to DIN 931 for an industrial project? Send the required fastener type, size, material grade, quantity and certification requirements to Ananka Fasteners. Our team can review the requirement and provide technical and commercial information for standard or custom configurations.
Recommended RFQ details: DIN 931 requirement, fastener type, nominal size, material grade, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
