Direct Wholesale Supply & High-Tonnage Fixtures of Industrial Bolts, Heavy Hex Nuts & Stud Bolts
Iran stands among the most sophisticated industrial metallurgy powerhouses in the region, possessing advanced hot and cold forging manufacturing plants. Exportmani provides verified direct mill access to produce standard high-tensile hex bolts (DIN 931/933), structural assembly sets (ASTM A325 / A490 / DIN 6914 HV), petrochemical stud bolts (ASTM A193 B7/B16), heavy hex nuts (ASTM A194 2H), and hardened washers. Engineered with high-performance anti-corrosion finishes including Dacromet, hot-dip galvanizing (HDG), and PTFE Xylan, our consignments are supplied with complete certified MTC dossiers across regional and Eurasian industrial projects.
HS Code
73181500 / 73181600
Minimum Order (MOQ)
3 Metric Tons (or 1x 20ft FCL)
Governing Standards
DIN, ISO, ASTM, ASME
Monthly Supply Capacity
+2,500 Metric Tons
Strategic Export Fastener Categories
Engineered precisely across static, dynamic, and harsh corrosive service environments:
High-Tensile Structural Bolts (HV Sets)
Standards: ASTM A325, A490, DIN 6914 / EN 14399-4
Designed specifically for heavy steel buildings, bridges, telecom towers, dams, and industrial pre-engineered structures; manufactured in Property Classes 8.8 and 10.9 with matching nuts and hardened washers to resist seismic and shear vibrations.
Petrochemical Stud Bolts & Heavy Nuts
Standards: ASTM A193 Gr. B7 / B7M / B16 with A194 2H / 2HM Nuts
Continuous-thread stud bolts tailored for high-pressure process piping, ANSI/ASME Class 150-2500 flanges, boilers, and heat exchangers; provides thermal creep resistance up to 500°C and severe sour gas resilience.
Engineered Hex Head Bolts & Heavy Nuts
Standards: DIN 933 (Full Thread), DIN 931 (Half Thread), DIN 934
Synthesized from cold-heading chromium-molybdenum alloy steels across Property Classes 8.8, 10.9, and 12.9; ideal for heavy machinery manufacturing, cement factories, mining equipment, and rail rolling stock.
Stainless Steel Fasteners (Corrosion Resistant)
Alloy Grades: A2-70 (AISI 304) & A4-80 (AISI 316 Marine Grade)
Completely impervious to atmospheric oxidation, marine humidity, chlorine vapors, and chemical acids; indispensable for offshore platforms, desalination plants, wastewater facilities, and hygienic food production lines.
Corrosion Barrier Technologies & Surface Engineering
Zinc Flake & Dacromet Coating
Advanced non-electrolytic finish completely free of hydrogen embrittlement hazards; sustains over 1,000 hours in neutral Salt Spray Tests (ASTM B117), ideal for 10.9 and 12.9 high-strength bolts.
Hot-Dip Galvanizing (HDG - ASTM A153)
Heavy sacrificial zinc protective barrier (50 to 85 microns thickness) compliant with EN ISO 10684; superior durability for outdoor power transmission towers, highway guardrails, and marine piers.
Fluoropolymer PTFE / Xylan Coating
Multi-layer thermosetting barrier coating resilient against severe acids, seawater, and bases with an ultra-low friction coefficient ensuring effortless torquing and breakout on offshore rigs.
Electro-Galvanized Zinc (Clear & Yellow Passivated)
Precision 5 to 15 micron uniform electroplated finish delivering aesthetic appeal and cost-effective corrosion defense for indoor mechanical equipment.
Mechanical Specifications, Tensile Strength & Hardness Data
Parameters verified in accredited mechanical testing laboratories compliant with ISO 898-1 and ASTM A370 standards:
| Mechanical Property | Standard Method | Class 8.8 | Class 10.9 | Class 12.9 | Stud Bolt B7 |
|---|---|---|---|---|---|
| Nominal Tensile Strength (Rm MPa) | ISO 6892 | ≥ 800 MPa | ≥ 1040 MPa | ≥ 1220 MPa | ≥ 860 MPa |
| Proof / Yield Stress (Rp0.2 MPa) | ISO 6892 | 640 MPa | 940 MPa | 1100 MPa | 720 MPa |
| Elongation at Fracture (A5 %) | Tensile Test | Min 12 % | Min 9 % | Min 8 % | Min 16 % |
| Rockwell Core Hardness (HRC) | ISO 6508 | 22 – 32 HRC | 32 – 39 HRC | 39 – 44 HRC | 25 – 35 HRC |
| Impact Energy Charpy V-Notch (Joules) | ISO 148-1 | ≥ 30 J (-20°C) | ≥ 27 J (-20°C) | ≥ 20 J (-20°C) | ≥ 40 J (-46°C) |
Export Packaging Engineering & Containerized Transit Integrity
25 kg Heavy-Duty 5-Ply Corrugated Cartons
Packed in high-crush-resistance kraft cartons with heavy polyethylene inner moisture barrier bags, barcoded with diameter, length, grade class, and furnace melt heat numbers.
ISPM-15 Heat-Treated Export Pallets
36 to 40 cartons stacked compactly on fumigated wooden pallets, banded tightly with high-tensile steel strapping and protected by heavy multi-layer waterproof stretch wrap (~1 MT per pallet).
Industrial Heavy Steel Kegs & Drums
Heavy gauge steel drums holding 50 to 100 kg, providing 100% mechanical impact immunity for long-distance maritime container shipments.
Maritime Corridors, Overland Transit & Commercial Terms
Overland Cross-Border Heavy Trucking
Dispatched via sealed heavy flatbeds and tilt trailers through Mehran and Bashmaq to Iraq; Bazargan to Turkey; and Norduz to Armenia, Georgia, and CIS industrial hubs.
Containerized Maritime Shipping (20ft Heavy FCL)
Heavy-duty 20ft container stuffing taking maximum payload advantage (up to 24-26 metric tons per container) from Bandar Abbas port directly to Jebel Ali, Doha, Sohar, and East Africa.
Settlement & Certified Commercial Banking
Certified corporate exchange wire, AED / USD / EUR settlements, T/T telegraphic installments, accompanied by original EN 10204 3.1 Mill Test Certificate (MTC) and COO.