At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASTM A563M. Metric-series carbon and alloy steel nuts (M12 to M36) – the metric counterpart of ASTM A563, now consolidated into ASTM A563/A563M. Property classes 8S, 8S3, 10S and 10S3 in heavy hex style; class governs proof load and hardness. Nut strength is specified as proof load stress (shown in the tensile column) rather than tensile/yield.
Metric-series carbon and alloy steel nuts (M12 to M36) – the metric counterpart of ASTM A563, now consolidated into ASTM A563/A563M. Property classes 8S, 8S3, 10S and 10S3 in heavy hex style; class governs proof load and hardness. Nut strength is specified as proof load stress (shown in the tensile column) rather than tensile/yield.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Class 8S | Carbon or alloy steel | Heavy hex, M12-M36; mates with A325M |
| Class 8S3 | Weathering steel | Heavy hex, M12-M36; weathering A325M |
| Class 10S | Carbon or alloy steel | Heavy hex, M12-M36; mates with A490M |
| Class 10S3 | Weathering steel | Heavy hex, M12-M36; weathering A490M |
Minimum mechanical requirements per ASTM A563M.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Class 8S (proof load) | 1075 MPa (156 ksi) | n/a | n/a | HV 188-372 / HRB89-HRC38 |
| Class 8S3 (proof load) | 1075 MPa (156 ksi) | n/a | n/a | HV 188-372 / HRB89-HRC38 |
| Class 10S (proof load) | 1245 MPa (181 ksi) | n/a | n/a | HV 272-372 / HRC26-38 |
| Class 10S3 (proof load) | 1245 MPa (181 ksi) | n/a | n/a | HV 272-372 / HRC26-38 |
| Grade | Key Composition, % |
|---|---|
| Classes 8S/10S | Carbon or alloy steel, quenched and tempered per class |
| Classes 8S3/10S3 | Weathering steel with Cu, Cr, Ni, Si for atmospheric corrosion resistance |
Metric equivalent of ASTM A563; now covered by the combined ASTM A563/A563M. ASME SA-563M is the ASME adoption with essentially identical content. Classes 8S/8S3 mate with A325M bolts, 10S/10S3 with A490M bolts.
For the official ASTM International standards catalogue, see the ASTM International standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We supply ASTM A563M 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.
Metric-series carbon and alloy steel nuts (M12 to M36) – the metric counterpart of ASTM A563, now consolidated into ASTM A563/A563M. Property classes 8S, 8S3, 10S and 10S3 in heavy hex style; class governs proof load and hardness. Nut strength is specified as proof load stress (shown in the tensile column) rather than tensile/yield.
Ananka Fasteners supplies Class 8S, Class 8S3, Class 10S, Class 10S3 to ASTM A563M. 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 ASTM A563M 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 ASTM A563M 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: ASTM A563M requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASTM A563M and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
