At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to BS EN 14399-9. High-strength structural bolting assemblies for preloading – Part 9: System HR or HV direct tension indicators (DTIs) and nut/bolt-face washers. Load-indicating washers whose protrusions compress at the target preload, plus the hardened face washers used with them.
High-strength structural bolting assemblies for preloading – Part 9: System HR or HV direct tension indicators (DTIs) and nut/bolt-face washers. Load-indicating washers whose protrusions compress at the target preload, plus the hardened face washers used with them.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| DTI (load indicator) | EN 14399-9 | Protrusion-type, hardened & tempered or controlled-rolled & tempered |
| Nut-face / bolt-face washer | EN 14399-9 | Hardened & tempered face washer used with the DTI |
Minimum mechanical requirements per BS EN 14399-9.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Direct tension indicator | – | – | – | <=380 HV (approx 38.8 HRC max) |
| Nut/bolt-face washer | – | – | – | 372-448 HV30 (38-45 HRC) |
| Grade | Key Composition, % |
|---|---|
| DTI / face washer | Quenched & tempered carbon or alloy steel |
European equivalent to ASTM F959 compressible-washer-type direct tension indicators. Used with EN 14399-3/-4 assemblies.
For the official BSI standards catalogue, see the BSI standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We supply BS EN 14399-9 fasteners — bolts, screws, studs, nuts and washers as applicable — for energy, petrochemical, marine, structural and general engineering service, in a full range of sizes and finishes.
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.
High-strength structural bolting assemblies for preloading – Part 9: System HR or HV direct tension indicators (DTIs) and nut/bolt-face washers. Load-indicating washers whose protrusions compress at the target preload, plus the hardened face washers used with them.
Ananka Fasteners supplies DTI (load indicator), Nut-face / bolt-face washer to BS EN 14399-9. See the Grades / Classes Covered table above for full details of each grade.
Minimum tensile strength, yield strength, elongation and hardness requirements vary by grade — see the Mechanical Properties table above for the complete breakdown.
We supply BS EN 14399-9 fasteners — bolts, screws, studs, nuts and washers as applicable — for energy, petrochemical, marine, structural and general engineering service, in a full range of sizes and finishes.
Yes. For a quotation, provide the required fastener type, grade, nominal size, dimensional standard, quantity and any inspection or certificate requirements.
Need a fastener released to BS EN 14399-9 for an industrial project? Send the required fastener type, grade, size, 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: BS EN 14399-9 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per BS EN 14399-9 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
