At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ISO 898-3. ISO 898-3 – Mechanical properties of fasteners made of carbon steel and alloy steel – Part 3: Flat washers with specified property classes. Defines hardness-based property classes for flat washers used in bolted joints with ISO 898-1 bolts and ISO 898-2 nuts.
ISO 898-3 – Mechanical properties of fasteners made of carbon steel and alloy steel – Part 3: Flat washers with specified property classes. Defines hardness-based property classes for flat washers used in bolted joints with ISO 898-1 bolts and ISO 898-2 nuts.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| 100 HV | ISO 898-3 | Soft flat washer, any process |
| 200 HV | ISO 898-3 | Medium hardness flat washer |
| 300 HV | ISO 898-3 | Hardened & tempered flat washer |
| 380 HV | ISO 898-3 | High-hardness washer (by agreement; not in current product standards) |
Minimum mechanical requirements per ISO 898-3.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| 100 HV | – | – | – | 100-200 HV |
| 200 HV | – | – | – | 200-300 HV (may reach 250 without rejection) |
| 300 HV | – | – | – | 300-370 HV (30-39 HRC) |
| 380 HV | – | – | – | 380-450 HV (39-45 HRC) |
| Grade | Key Composition, % |
|---|---|
| 100 HV / 200 HV | Carbon steel, process at manufacturer’s discretion |
| 300 HV / 380 HV | Quenched & tempered carbon or alloy steel |
Metric hardened-washer counterpart to hardened washers under ASTM F436; classes correspond by hardness (300 HV washer ~ structural hardened washer).
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 supply ISO 898-3 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.
ISO 898-3 – Mechanical properties of fasteners made of carbon steel and alloy steel – Part 3: Flat washers with specified property classes. Defines hardness-based property classes for flat washers used in bolted joints with ISO 898-1 bolts and ISO 898-2 nuts.
Ananka Fasteners supplies 100 HV, 200 HV, 300 HV, 380 HV to ISO 898-3. 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 ISO 898-3 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 ISO 898-3 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: ISO 898-3 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ISO 898-3 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
