Hex Bolts Exporter from India
Grade 4.6 to 12.9 hexagonal bolts — DIN 931/933, ISO 4014/4017, ASTM A307 — M4 to M100 — shipped from Coimbatore to 30+ countries.
TERNS EXIM is a Coimbatore, India-based exporter of high-tensile hex bolts in property classes 8.8, 10.9, and 12.9, manufactured to DIN 931, DIN 933, ISO 4014, ISO 4017, and ASTM standards. We supply sizes from M5 to M64 in plain (black), zinc-plated, and hot-dip galvanized finishes, with a minimum order quantity of 10,000 pieces or 700 kg depending on size. Every shipment includes Mill Test Certificates, with optional third-party inspection by SGS, BV, or TUV.
| Specification | Details |
|---|---|
| Property Classes | 8.8, 10.9, 12.9 (high tensile) |
| Size Range | M5 to M64 |
| Standards | DIN 931, DIN 933, ISO 4014, ISO 4017, ASTM A325, BS, JIS, BIS |
| Finishes | Plain / Black, Zinc Plated, Hot-Dip Galvanized (HDG) |
| Thread Type | Full thread (DIN 933) and partial thread (DIN 931) |
| Material | Carbon steel, alloy steel |
| MOQ | 10,000 pieces or 700 kg |
| Certification | Mill Test Certificate; optional SGS / BV / TUV |
| Lead Time | Quote on enquiry |
| HS Code | 7318.15 |
| Property Class | Tensile Strength (MPa) | Yield Strength (MPa) | Typical Application |
|---|---|---|---|
| 8.8 | 800 | 640 | General structural, machinery, automotive |
| 10.9 | 1040 | 940 | High-stress joints, heavy equipment, steel structures |
| 12.9 | 1220 | 1100 | Critical high-load applications, precision engineering |
India's Trusted Hex Bolt Exporter — Quality, Standards & Global Reach
TERNS EXIM exports a comprehensive range of hexagonal head bolts from Coimbatore, India to industrial buyers across the USA, UAE, UK, Germany, Australia, and 30+ countries. Our hex bolts comply with DIN 931 (partial thread), DIN 933 (full thread), ISO 4014, ISO 4017, and ASTM A307 — covering every grade from 4.6 structural bolts to 12.9 high-tensile fasteners for critical applications.
We source exclusively from certified Indian manufacturers, conduct pre-shipment inspection on all consignments, and supply full Mill Test Certificates (MTC) as standard. Whether you need 500 pieces for a trial order or 50-tonne container loads for ongoing projects, TERNS EXIM delivers on time with complete export documentation.
Key Applications
- Steel structure fabrication & civil construction
- Automotive assembly and heavy transport vehicles
- Industrial machinery, pumps & compressors
- Petrochemical, oil & gas pipeline flanges
- Power generation & wind turbine structures
- Marine, offshore platforms & shipbuilding
Applicable Standards
Product Variants
Types of Hex Bolts We Export
Full range of hexagonal bolt variants for structural, high-tensile, corrosion-resistant, and OEM applications.
Hex Bolts — Partial Thread
DIN 931 / ISO 4014. Unthreaded shank for shear-loaded joints and precise alignments.
Hex Cap Screws — Full Thread
DIN 933 / ISO 4017. Fully threaded shank for deep engagement and through-bolt applications.
High Tensile Bolts
Grade 8.8, 10.9, 12.9. ASTM A325 / A490 for structural steel connections and heavy machinery.
Stainless Steel Hex Bolts
SS 304 (A2) and SS 316 (A4). Corrosion-resistant for marine, food-grade, and chemical environments.
Flange Bolts
Integrated washer flange eliminates a separate washer, distributes load over a wider area.
Custom / OEM Hex Bolts
Special thread pitch, oversized heads, proprietary coatings — made to customer drawing and specification.
Technical Specifications
Hex Bolt Specifications at a Glance
All dimensions conform to international standards. Custom sizes and special configurations available on request.
| Parameter | Details |
|---|---|
| Applicable Standards | DIN 931, DIN 933, ISO 4014, ISO 4017, ASTM A307, ASTM A325, ASTM A490, IS 1367, BS 3692 |
| Property Classes (Metric) | 4.6, 4.8, 5.8, 8.8, 10.9, 12.9 |
| Grades (Imperial / ASTM) | Grade 2, Grade 5, Grade 8 (SAE); A307, A325, A490 (ASTM) |
| Diameter Range | M4 – M100 metric; UNC/UNF 1/4" – 4" also available |
| Length Range | 10 mm – 800 mm standard; custom lengths on order |
| Thread Type | Coarse thread (M), Fine thread (MF), UNC, UNF as specified |
| Materials | Mild Steel (MS), Carbon Steel, SS 304 (A2), SS 316 (A4), Alloy Steel (Cr-Mo), Brass, Duplex SS |
| Surface Finishes | Self-Colour (plain), Zinc Electroplated (Cr3), Hot-Dip Galvanized (HDG), Dacromet, Black Oxide, Mechanical Zinc |
| Head Type | Standard Hexagonal; Reduced Hex; Flange Hex; Socket Cap (on request) |
| Certifications Supplied | Mill Test Certificate (EN 10204 3.1 / 3.2); Third-party inspection by SGS, BV, TÜV available on request |
| Packaging | Polybags in cartons; wooden crates; bulk sacks; customer-specific labeling available |
| Typical Lead Time | 7 – 21 working days from order confirmation |
| MOQ | 10,000 pieces or 700 kg (trial samples available for new buyers) |
Materials Available
Material Grades & Options
We export hex bolts in all major material grades to match your application, corrosion environment, and performance requirements.
Carbon Steel (MS)
Grades 4.6, 8.8, 10.9, 12.9. Most cost-effective for general structural and mechanical applications. Zinc or HDG coated for outdoor use.
Stainless Steel 304
Grade A2-70. Excellent general corrosion resistance. Ideal for food processing, construction, and light chemical environments.
Stainless Steel 316
Grade A4-80. Superior chloride and acid resistance. Required for marine, offshore, pharmaceutical, and coastal environments.
Alloy Steel (Cr-Mo)
Grades 10.9, 12.9 chromium-molybdenum. For extreme high-tensile applications in heavy machinery and infrastructure.
Our Product Range
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Buyer FAQ
Frequently Asked Questions — Hex Bolts
What is the difference between DIN 931 and DIN 933 hex bolts?
DIN 931 hex bolts are partially threaded (shank under the head is unthreaded), while DIN 933 hex bolts are fully threaded from head to tip. Choose DIN 931 for shear loads and DIN 933 for full-grip clamping.
What is the minimum order quantity for hex bolts?
Our MOQ is 10,000 pieces or 700 kg depending on bolt size.
Do you supply hot-dip galvanized hex bolts for export?
Yes, we supply hex bolts in plain, zinc-plated, and hot-dip galvanized finishes for corrosion resistance in marine and outdoor applications.
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Get Your Hex Bolt Quote
Fill in your requirements below and we'll respond within 24 hours with a competitive export price, grade availability, and shipping options.
- Free quote — Grade 4.6 to 12.9
- DIN, ISO, ASTM certified stock
- Trial orders accepted from new buyers