At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to BS EN 14399-3. Part 3 of the EN 14399 series: high-strength structural bolting assemblies for preloading – System HR (high resistance), hexagon bolt and nut assemblies. Specifies the HR assembly (standard hexagon head bolt + hexagon nut, used with EN 14399-1/-5/-6 washers) suitable for preloading by the torque method or combined method. Property classes 8.8 and 10.9.
Part 3 of the EN 14399 series: high-strength structural bolting assemblies for preloading – System HR (high resistance), hexagon bolt and nut assemblies. Specifies the HR assembly (standard hexagon head bolt + hexagon nut, used with EN 14399-1/-5/-6 washers) suitable for preloading by the torque method or combined method. Property classes 8.8 and 10.9.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| HR 8.8 | Carbon-boron/alloy steel, Q&T | Hex bolt + nut class 8/HR assembly |
| HR 10.9 | Alloy steel, Q&T | Hex bolt + nut class 10/HR assembly – most common |
Minimum mechanical requirements per BS EN 14399-3.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Bolt class 8.8 | 800 MPa (116 ksi) | 640 MPa (93 ksi) | 12 | 250-320 HV |
| Bolt class 10.9 | 1040 MPa (151 ksi) | 940 MPa (136 ksi) | 9 | 320-380 HV |
| Nut class 8 (HR) | Proof 800 MPa (116 ksi) | n/a (nut) | n/a | <=302 HV |
| Nut class 10 (HR) | Proof 1040 MPa (151 ksi) | n/a (nut) | n/a | <=353 HV |
| Grade | Key Composition, % |
|---|---|
| Class 8.8 | Carbon-boron or alloy steel, quenched & tempered per ISO 898-1 |
| Class 10.9 | Alloy steel (Cr/Mo/B), quenched & tempered |
Bolt/nut mechanicals per ISO 898-1/898-2. Analogous in application to ASTM F3125 (A325/A490 heavy-hex structural bolts). Companion to EN 14399-10 (HRC calibrated-preload system).
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 14399-3 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.
Part 3 of the EN 14399 series: high-strength structural bolting assemblies for preloading – System HR (high resistance), hexagon bolt and nut assemblies. Specifies the HR assembly (standard hexagon head bolt + hexagon nut, used with EN 14399-1/-5/-6 washers) suitable for preloading by the torque method or combined method. Property classes 8.8 and 10.9.
Ananka Fasteners supplies HR 8.8, HR 10.9 to BS EN 14399-3. 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 14399-3 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 14399-3 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 14399-3 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per BS EN 14399-3 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
