At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to BS EN 14399-7. High-strength structural bolting assemblies for preloading – Part 7: System HR countersunk head bolt and nut assemblies. Preloadable countersunk (flush) head bolts with nuts for connections requiring a flat surface, sizes M12-M36.
High-strength structural bolting assemblies for preloading – Part 7: System HR countersunk head bolt and nut assemblies. Preloadable countersunk (flush) head bolts with nuts for connections requiring a flat surface, sizes M12-M36.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Bolt 8.8 | EN ISO 898-1 class 8.8 | Countersunk head, System HR |
| Bolt 10.9 | EN ISO 898-1 class 10.9 | Countersunk head, System HR |
| Nut 8 / 10 | EN ISO 898-2 | Matched to 8.8 / 10.9 bolt |
Minimum mechanical requirements per BS EN 14399-7.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Bolt class 8.8 | 116 (800) | 94 (640) | 12 | 255-336 HV |
| Bolt class 10.9 | 145 (1000) | 131 (900) | 9 | 320-380 HV |
| Grade | Key Composition, % |
|---|---|
| Bolt 8.8 | C, CB or alloy steel, quenched & tempered |
| Bolt 10.9 | Alloy or C/CB steel, quenched & tempered |
Countersunk-head variant of System HR (EN 14399-3). Property classes per EN ISO 898-1/-2.
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 14399-7 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 7: System HR countersunk head bolt and nut assemblies. Preloadable countersunk (flush) head bolts with nuts for connections requiring a flat surface, sizes M12-M36.
Ananka Fasteners supplies Bolt 8.8, Bolt 10.9, Nut 8 / 10 to BS EN 14399-7. 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 14399-7 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 14399-7 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 14399-7 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per BS EN 14399-7 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
