At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to BS 3692. British Standard for ISO metric precision hexagon bolts, screws and nuts. Specifies dimensions, tolerances and mechanical property classes for precision-machined (higher accuracy) hexagon fasteners to the ISO metric thread series. Property classes follow ISO 898-1 (bolts) and ISO 898-2 (nuts).
British Standard for ISO metric precision hexagon bolts, screws and nuts. Specifies dimensions, tolerances and mechanical property classes for precision-machined (higher accuracy) hexagon fasteners to the ISO metric thread series. Property classes follow ISO 898-1 (bolts) and ISO 898-2 (nuts).
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Class 8.8 | Medium carbon or C-boron steel, Q&T | Precision hex bolts/screws |
| Class 10.9 | Alloy steel, Q&T | Precision hex bolts/screws |
| Class 12.9 | Alloy steel, Q&T | Higher-strength precision screws |
| Nut class 8 / 10 / 12 | Carbon/alloy steel | Matched precision hex nuts |
Minimum mechanical requirements per BS 3692.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Class 8.8 (>M16) | 830 MPa (120 ksi) | 660 MPa (96 ksi) | 12 | 255-336 HV |
| Class 8.8 (<=M16) | 800 MPa (116 ksi) | 640 MPa (93 ksi) | 12 | 250-320 HV |
| Class 10.9 | 1040 MPa (151 ksi) | 940 MPa (136 ksi) | 9 | 320-380 HV |
| Class 12.9 | 1220 MPa (177 ksi) | 1100 MPa (160 ksi) | 8 | 385-435 HV |
| Nut class 8 | Proof 800 MPa (116 ksi) | n/a (nut) | n/a | <=302 HV |
| Nut class 10 | Proof 1040 MPa (151 ksi) | n/a (nut) | n/a | <=353 HV |
| Grade | Key Composition, % |
|---|---|
| Class 8.8 | Carbon or carbon-boron steel, quenched & tempered; C 0.15-0.40 |
| Class 10.9 | Alloy steel (Cr/Mo/B) or medium-C alloy, quenched & tempered |
| Class 12.9 | Alloy steel with Cr/Mo, quenched & tempered |
Property classes per ISO 898-1/898-2; dimensionally the precision (higher-accuracy) counterpart to BS 4190 black hexagon fasteners. Aligns with EN ISO 4014/4017/4032.
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 3692 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.
British Standard for ISO metric precision hexagon bolts, screws and nuts. Specifies dimensions, tolerances and mechanical property classes for precision-machined (higher accuracy) hexagon fasteners to the ISO metric thread series. Property classes follow ISO 898-1 (bolts) and ISO 898-2 (nuts).
Ananka Fasteners supplies Class 8.8, Class 10.9, Class 12.9, Nut class 8 / 10 / 12 to BS 3692. 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 3692 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 3692 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 3692 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per BS 3692 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
