At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to IS 7178. IS 7178 ‘Heat-treated steel tapping screws – Mechanical properties’ (IS 7178:2002). Indian Standard specifying the mechanical property requirements – surface and core hardness, torsional and tapping performance – for case-hardened/heat-treated steel self-tapping and thread-forming screws. It is NOT a nickel-alloy bar standard.
IS 7178 ‘Heat-treated steel tapping screws – Mechanical properties’ (IS 7178:2002). Indian Standard specifying the mechanical property requirements – surface and core hardness, torsional and tapping performance – for case-hardened/heat-treated steel self-tapping and thread-forming screws. It is NOT a nickel-alloy bar standard.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Case-hardened tapping screw steel | low-carbon / carbon steel | Carburised & hardened per IS 1367 |
Minimum mechanical requirements per IS 7178.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Heat-treated tapping screw | – | – | – | Surface >=450 HV0.3; core 270-390 HV; case depth per size |
| Grade | Key Composition, % |
|---|---|
| Tapping screw steel | Low/medium-carbon steel to IS 1367; carbon 0.13-0.50 depending on hardening route |
Aligns with ISO 2702 ‘Heat-treated steel tapping screws – Mechanical properties’ and the IS 1367 / ISO 898 fastener property framework; product dimensions per IS 7168 and related tapping-screw standards.
For the official Bureau of Indian Standards (BIS) standards catalogue, see the Bureau of Indian Standards (BIS) standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We supply IS 7178 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.
IS 7178 ‘Heat-treated steel tapping screws – Mechanical properties’ (IS 7178:2002). Indian Standard specifying the mechanical property requirements – surface and core hardness, torsional and tapping performance – for case-hardened/heat-treated steel self-tapping and thread-forming screws. It is NOT a nickel-alloy bar standard.
Ananka Fasteners supplies Case-hardened tapping screw steel to IS 7178. 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 IS 7178 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 IS 7178 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: IS 7178 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per IS 7178 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
