At Ananka Fasteners Pvt Ltd, we manufacture fasteners to the dimensional requirements of ISO 21670. Hexagon weld nuts with flange – a hex nut with an integral flat flange carrying weld projections (bosses) for resistance projection welding to sheet metal. Coarse thread, common sizes M5 to M12. The flange underside carries three or more weld projections that collapse during welding.
Hexagon weld nuts with flange – a hex nut with an integral flat flange carrying weld projections (bosses) for resistance projection welding to sheet metal. Coarse thread, common sizes M5 to M12. The flange underside carries three or more weld projections that collapse during welding.
Hexagon flange weld nut (projection weld)
Key dimensions for common sizes are listed below.
| Thread d | Width across flats s (mm) | Flange dia dc (mm) | Total height m (mm) | Weld projections |
|---|---|---|---|---|
| M5 | 8 | 11.5 | 5.0 | 3 |
| M6 | 10 | 14.0 | 6.0 | 3 |
| M8 | 13 | 17.5 | 6.5 | 3 |
| M10 | 15 | 21.0 | 7.0 | 3 |
| M12 | 18 | 25.0 | 8.0 | 3 |
Metric coarse thread, tolerance class 6H
[‘DIN 929’, ‘ISO 21669’, ‘ISO 4161’, ‘EN ISO 21670’]
For the official ISO standards catalogue, see the ISO standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We produce ISO 21670 fasteners in carbon and alloy steel, austenitic, duplex and super-duplex stainless, and high-nickel, titanium and copper alloys — for structural, flanged, machinery and process applications worldwide.
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.
Ananka Fasteners supplies every lot with full material traceability and third-party testing on request.
Hexagon weld nuts with flange – a hex nut with an integral flat flange carrying weld projections (bosses) for resistance projection welding to sheet metal. Coarse thread, common sizes M5 to M12. The flange underside carries three or more weld projections that collapse during welding.
Ananka Fasteners manufactures ISO 21670 in sizes from M5–M12. See the Dimensional Table above for the complete size breakdown.
Metric coarse thread, tolerance class 6H
We produce ISO 21670 fasteners in carbon and alloy steel, austenitic, duplex and super-duplex stainless, and high-nickel, titanium and copper alloys — for structural, flanged, machinery and process applications worldwide.
Yes. For a quotation, provide the required nominal size, material grade, quantity and any inspection or certificate requirements.
Need a fastener manufactured to ISO 21670 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: ISO 21670 requirement, nominal size, material grade, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Dimensions compiled per ISO 21670 and industry references; provided for reference only — confirm against the current edition of the standard before design use.
