Bolts, Nuts and Fasteners
Hexagon Head Transmission Tower Bolts
Strategic Recommendations for Hexagon Head Transmission Tower Bolts (IS 12427:2001)
- Engage Early with BIS & Labs
Begin BIS Scheme-I licence application, complete product testing for IS 12427:2001, and align to enforcement dates (1 Aug 2024 / 1 Nov 2024 / 1 Feb 2025). - Partner with Compliance Experts
Consult QCO/BIS specialists (ERA Compliance team) for documentation, lab testing, ISI marking, and exemption filings. - Contact ERA Support Team
📧 cs@eraglobal.co.in | 📞 +91 9599296331 | 💬 WhatsApp – Assistance for filing, lab coordination, and compliance with import/spares/R&D limits. - Track Notifications & Circulars
Subscribe to the ERA Newsletter for real-time updates on QCO 2024 and BIS updates and ensure timely filing for exemptions (export-linked imports, import caps, R&D, spares). Maintain records as prescribed. - Do a Gap Assessment
Check all transmission tower bolt SKUs for compliance; verify marking, packaging, and testing readiness; declare non-marked stock within timelines to avail exemptions.
| Section | Details |
|---|---|
| Product Name | Hexagon Head Transmission Tower Bolts |
| Applicable Indian Standard (IS) No. | IS 12427:2001. |
| Title of Indian Standard | Fasteners – Threaded Steel Fasteners – Hexagon Head Transmission Tower Bolts. |
| Quality Control Order | Bolts, Nuts and Fasteners (Quality Control) Order, 2024. |
| Notification & Amendments | Notified via S.O. 2771(E), dated 12 July 2024. Supersedes: Bolts, Nuts and Fasteners (Quality Control) Order, 2023 (S.O. 3267(E), dated 21 July 2023). |
| Final Enforcement Date | For Large Enterprises: 1 August 2024, For Small Enterprises: 1 November 2024, For Micro Enterprises: 1 February 2025. |
| Objective & Scope | To ensure quality, safety, and performance of threaded steel bolts used in power transmission towers by mandating BIS certification under IS 12427:2001. |
| Products Covered | Hexagon head threaded steel bolts specifically designed for transmission tower applications. |
| Exemptions | - Products meant exclusively for export. - Imports as part of finished goods/sub-assemblies. - Enterprises registered on Udyam Portal with plant & machinery cost ≤ ₹25 lakh and turnover ≤ ₹2 crore (previous FY). - R&D imports up to 200 kg/year. - Import substitution allowance: 80% (2024-25), 70% (2025-26), 50% (2026-27). - Spares/after-sales service: up to 5% of 2023-24 imports. |
| Industries Impacted | Power Transmission & Distribution, Telecom Towers, Steel Fabrication & Construction, Infrastructure Projects. |
| Mandatory Compliance | ISI marking mandatory under BIS license (Scheme-I of BIS Conformity Assessment Regulations, 2018). |
| Next Steps for Stakeholders | ISI marking mandatory under BIS license (Scheme-I of BIS Conformity Assessment Regulations, 2018). |
| Legal Framework Provision & Enforcement | Enforced under BIS Act, 2016. BIS is the certifying authority; violation punishable under the Act. |
| Penalties for Non-Compliance | • Seizure of non-compliant goods • Suspension or cancellation of licence • Fines or imprisonment up to two years, or both |
| Conclusion | ISI marking mandatory under BIS license (Scheme-I of BIS Conformity Assessment Regulations, 2018). |
| References / Annexures | QCO 2024: S.O. 2771(E) [12 July 2024] Superseded QCO 2023: S.O. 3267(E) [21 July 2023] |
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Notification
Hexagon Head Transmission Tower Bolts (IS 12427:2001) have been notified under the Bolts, Nuts and Fasteners (Quality Control) Order, 2024, issued via S.O. 2771(E) dated 12 July 2024 by the Ministry of Commerce & Industry under the BIS Act, 2016. This Order superseded the earlier QCO of 2023, mandating BIS certification for threaded steel bolts used in transmission towers.
Enforcement Timeline
- Large and Medium Enterprises: 1 August 2024
- Small Enterprises: 1 November 2024
- Micro Enterprises: 1 February 2025
Overview
Hexagon head transmission tower bolts are threaded steel fasteners specifically designed for assembling and securing structural members in transmission line towers. These bolts are critical for the stability, safety, and longevity of high-voltage electricity transmission infrastructure. IS 12427:2001 provides specifications on materials, dimensions, and performance to ensure that these bolts can withstand heavy loads, environmental stresses, and long-term outdoor exposure.
Objective & Scope
The purpose of IS 12427:2001 is to regulate the quality, strength, and dimensional accuracy of hexagon head bolts used in transmission towers. The scope covers requirements for raw material, tensile and shear strength, dimensional tolerances, coatings for corrosion resistance (e.g., galvanization), and testing methods. The standard ensures reliability, interchangeability, and safety in critical power transmission structures.
Products Covered
This standard applies to Hexagon Head Transmission Tower Bolts, manufactured from carbon steel or alloy steel, used in power transmission towers and associated steel structures. These bolts are designed to provide strong, stable joints that withstand mechanical loads, wind, vibration, and environmental exposure.
Exemptions Provided
As per the 2024 QCO, the following exemptions apply:
- Bolts manufactured exclusively for export.
- Bolts imported as part of a finished product, sub-assembly, or component.
- Products manufactured by micro-enterprises registered on the Udyam Portal, with plant & machinery investment ≤ ₹25 lakhs and turnover ≤ ₹2 crores.
- 3-year exemption for imports used in export-oriented manufacturing.
- Up to 200 kg annually allowed for research and development purposes.
- Up to 5% of the 2023–24 import value permitted for use in after-sales service and spares.
Industries Impacted
- Fastener Manufacturers – must obtain BIS certification for transmission tower bolts.
- Power Transmission & Distribution Sector – directly dependent on certified fasteners for structural integrity.
- Construction & Engineering Contractors – must procure BIS-certified bolts for power projects.
- Steel Fabrication & EPC Companies – required to comply with BIS standards in tower fabrication.
- Importers & Exporters – subject to certification requirements with limited exemptions.
Mandatory Compliance Requirements
- All transmission tower bolts under IS 12427:2001 must bear the ISI mark.
- Certification is compulsory under Scheme-I of BIS (Conformity Assessment) Regulations, 2018.
- Products must undergo testing at BIS-approved laboratories.
- Packaging and labeling must display the ISI mark clearly before sale or installation in projects.
Next Steps for Stakeholders
- Manufacturers: Apply for BIS certification, align production with IS requirements, and ensure ISI-marked labeling.
- Importers: Check exemption provisions, maintain proper records, and file declarations for old stock.
- Utilities & EPC Contractors: Update procurement policies to restrict usage to BIS-marked tower bolts.
- Industry Bodies: Provide compliance guidance and training for SMEs.
Legal Provisions, Enforcement & Penalties
Penalties for non-compliance include seizure of products, suspension of BIS licenses, monetary fines, and imprisonment up to two years, or both.
Non-compliance may lead to product seizure, fines, suspension of licenses, and imprisonment up to two years, or both.
Conclusion
From 1 August 2024 (with staggered deadlines for SMEs), Hexagon Head Transmission Tower Bolts (IS 12427:2001) must comply with BIS certification and carry the ISI mark. The 2024 QCO strengthens quality assurance in fasteners used for critical electricity transmission infrastructure, ensuring safety, durability, and structural stability. Early compliance is essential to avoid project delays and legal risks.
Ready to start your certification journey?
Let us help you navigate regulatory challenges and achieve certification with ease. Leave us your details, and we’ll get back to you—or request a free consultation today.