At Ananka Fasteners Pvt Ltd, we manufacture fasteners to the dimensional requirements of ISO 7049. ISO 7049 covers cross-recessed (type H or Z) PAN head tapping screws (equivalent to DIN 7981), with a hardened tapping-screw thread (ISO 1478 ST series). The input description ‘CSK Flat Head’ is incorrect – it is a PAN head (the cross-recessed countersunk tapping screw is ISO 7050). Sizes ST2.2 to ST8.
ISO 7049 covers cross-recessed (type H or Z) PAN head tapping screws (equivalent to DIN 7981), with a hardened tapping-screw thread (ISO 1478 ST series). The input description ‘CSK Flat Head’ is incorrect – it is a PAN head (the cross-recessed countersunk tapping screw is ISO 7050). Sizes ST2.2 to ST8.
Cross-recessed pan head tapping screw
Key dimensions for common sizes are listed below.
| Thread ST | Head dia dk (mm) | Head height k (mm) | Cross recess |
|---|---|---|---|
| ST2.2 | 4.0 | 1.6 | H0 / Z0 |
| ST2.9 | 5.6 | 2.1 | H1 / Z1 |
| ST3.5 | 7.0 | 2.6 | H2 / Z2 |
| ST3.9 | 7.5 | 2.8 | H2 / Z2 |
| ST4.2 | 8.0 | 3.0 | H2 / Z2 |
| ST4.8 | 9.5 | 3.6 | H2 / Z2 |
| ST5.5 | 11.0 | 4.1 | H3 / Z3 |
| ST6.3 | 12.0 | 4.6 | H3 / Z3 |
| ST8 | 16.0 | 6.0 | H4 / Z4 |
Tapping-screw thread per ISO 1478 (ST series)
[‘DIN 7981’, ‘ISO 1481’, ‘ISO 7050’, ‘ISO 1478’]
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 7049 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.
ISO 7049 covers cross-recessed (type H or Z) PAN head tapping screws (equivalent to DIN 7981), with a hardened tapping-screw thread (ISO 1478 ST series). The input description ‘CSK Flat Head’ is incorrect – it is a PAN head (the cross-recessed countersunk tapping screw is ISO 7050). Sizes ST2.2 to ST8.
Ananka Fasteners manufactures ISO 7049 in sizes from ST2.2–ST8. See the Dimensional Table above for the complete size breakdown.
Tapping-screw thread per ISO 1478 (ST series)
We produce ISO 7049 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 7049 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 7049 requirement, nominal size, material grade, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Dimensions compiled per ISO 7049 and industry references; provided for reference only — confirm against the current edition of the standard before design use.
