Bolt Grades Explained: 8.8 vs 10.9 vs 12.9
What do the numbers on a bolt head actually mean? ISO 898-1 property classes, tensile and yield strengths, head markings, and when to specify each grade.
Read article →TERNS EXIM Blog — Fastener Guides & Export Insights
Technical knowledge and practical guidance for global buyers sourcing industrial fasteners from India.
Technical
Technical Guides
Hot-Dip Galvanized vs Zinc Plated vs Geomet: Fastener Coatings Compared
How each coating works, salt-spray hours, thickness, cost, temperature and marine suitability — and which to specify for your application.
Read article →DIN vs ISO vs ASTM: Fastener Standards Explained for International Buyers
What each standard system covers, where it is used, how DIN and ISO map to each other, and which system to specify when ordering from India.
Read article →Commercial
Trade & Sourcing Guides
How to Import Fasteners from India: A Complete Buyer's Guide
Supplier vetting, RFQ writing, Incoterms, payment terms, quality assurance, lead times, and the export documents you should receive.
Read article →FOB vs CIF for Fastener Imports: Which Incoterm Should You Choose?
Who handles freight, insurance, and risk under each term — and which suits new versus experienced importers.
Read article →How to Verify an Indian Fastener Exporter: A Due-Diligence Guide
IEC registration, Mill Test Certificates, third-party inspection, sample orders, and payment security — what to check before you commit.
Read article →Application
Application Guides
Best Fasteners for Construction & Structural Steel Projects
Structural bolts, anchor bolts, foundation bolts — the right grades (8.8/10.9), coatings, and standards (ASTM A325/A490) for construction applications.
Read article →Choosing Fasteners for Marine & Coastal Environments: A Corrosion Guide
Stainless A4/316 vs A2/304 vs hot-dip galvanized — material and coating selection for saltwater, coastal, and offshore fastener applications.
Read article →Stay Informed
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