DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available
Premium DIN933 Hex Bolts for Industrial Applications

The din933 hex bolt series stands as the global standard for hexagonal head bolts, specified for full-threaded applications across critical industries. Demanded for its robust performance, high consistency, and versatility, DIN 933 bolts—including variants like mild steel hex bolt, DIN 933 M10, and DIN 933 A2 stainless steel—continue to set benchmarks in sectors such as petrochemical, metallurgy, water treatment, energy, and more.

DIN933 (Deutschland Institut für Normung) specifies hexagon head set screws (product grade A and B) with metric thread, recognized by ISO 4017 and commonly referenced in EN, ANSI, and JIS equivalents for engineering interoperability.

2024 Market Trend: Why DIN933 Hex Bolt Remains Top Choice?

  • Global manufacturing output for DIN 933 fasteners is projected to exceed 760,000 tons in 2024 (Fastener World), rising 5.9% YoY—driven by infrastructure, renewable energy, smart factories.
  • Growth in mild steel hex bolt segment (notably M10, M12) is propelled by sustainable construction and retrofitting of industrial facilities worldwide.
  • Corrosion-resistant DIN 933 A2 (stainless) and A4 variants see robust uptake in offshore, food processing, and waterworks due to stricter ISO, FDA compliance.
  • Users demand {certified traceability, custom marking, superior mechanical grade} for mission-critical assemblies.
DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available

Key Technical Specifications | Parameter Insights & Comparison

Standard Material Grade/Class Thread Size (M) Finish Tensile Strength (MPa) Corrosion Resistance Typical Application
DIN933 / ISO4017 Carbon Steel 8.8 / 10.9 M5–M64 Zinc Plated / HDG 830–1040 Medium Mechanical, General
DIN933 A2 Stainless Steel A2-70 M5–M24 Plain finish 700–800 Excellent Chemical/Marine
Mild Steel Hex Bolt Mild Steel 4.6 / 5.6 M6–M24 Black / Zn / HDG 400–600 Low Light Structural
DIN 933 M10 Multiple 8.8 / A2 M10×1.5 Zinc / Stainless 800–900 Depending Machinery
Industry Data:
According to Global Fastener News, full-threaded DIN933 hex bolt fasteners accounted for over 41% of all hex bolt specifications in European manufacturing lines during 2023. They're dominant due to repeatable assembly torque, ISO testing certification, and traceable batch production.

Manufacturing Process Flow – Step-by-Step Analysis

DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available
Raw Material
Preparation
 → DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available
Cold Forging
Forming
 → DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available
CNC
Thread Rolling
 → DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available
Heat Treatment
& Surface Finishing
 → DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available
Automated
Inspection & Packing
  1. Raw material selection: Certified steel (per ISO 898-1), A2/A4 stainless, or mild steel rods for class/grade compliance.
  2. Cold forging: High-speed heading forms the hex head; ensures grain flow for high tensile strength.
  3. CNC Thread Rolling: Applies metric thread per DIN standard—guarantees tolerance (6g), minimizing thread friction.
  4. Heat treatment: (For 8.8/10.9 steel) achieves mechanical strength; hardness verified (Rockwell C scale) at 21-32 HRC for durability.
  5. Surface Finishing: Zinc, hot-dip galvanizing, or plain/black finishes; DIN 933 A2 remains uncoated for corrosion resistance per ASTM F593.
  6. QA Inspection: Optical/laser inspection, gauge checks (go/no-go), and batch traceability (ISO 9001, PPAP, IATF 16949).
For full video of manufacturing, visit: DIN933 Hex Bolt Manufacturing Process.
DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available
High precision head and threads – critical for automated assembly

Typical Applications & Field-Proven Advantages

  • Oil & Gas / Chemical Plant Equipment (DIN 933 A2)
  • Metal Structure Assembly (mild steel hex bolt for framework, platforms)
  • Water Supply & Distribution (corrosion-resistant fasteners in ISO 3506 system)
  • High-Precision Machinery (din933 hex bolt M10, M12 for fixed assembly)
  • Infrastructure Construction (bridge, tunnel, renewable installations)
  • Automated Factory Lines (batch installation with traceable torque)
DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available
DIN933 Hex Bolts in heavy-duty chemical piping
DIN933 Hex Bolt vs. Major Global Manufacturers
Supplier Certifications Min Lot Traceability Custom Marking Warranty
HBTBLS (China) ISO9001, IATF16949, SGS YES (barcode) YES 5 Years
Bumax (Sweden) ISO9001, DNV, CE YES Available 5 Years
Unbrako/SPS (India/USA) ISO9001, API, PED YES Available 3 Years
Generic/Bulk Chinese Basic/None NO NO 1 Year
HBTBLS DIN933 Hex Bolt solutions are certified to ISO/ASTM standards, with full traceability and five-year warranty for industrial procurement contracts.

Technical Parameter Data Visualization

All data and trends referenced from Global Fastener News (2024 Report) and Fastener World.

Customization & Engineering Service for DIN933 Hex Bolt

  • Material Options: Carbon steel (Grade 4.6/8.8/10.9), mild steel, A2/A4 stainless, duplex/super duplex for offshore.
  • Finish: Customized zinc (white/blue/yellow passivate), black oxide, hot dip galvanizing, or uncoated for food grade.
  • Thread Length: Fully threaded per DIN933 up to 5×diameter; partial thread variant available.
  • Certification: Full EN 10204 3.1/3.2, ISO 898-1, ASTM F593, RoHS compliance for global supply chains.
  • Package: Custom carton labeling, palletizing, barcode tracking for industrial MRO/maintenance logistics.
DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available
Custom sizes & OEM marking on bulk DIN933 hex bolts
Request Your DIN933 Hex Bolt Quote or Custom Engineering Support at: www.hbtbls.com/4-8-hex-bolt.html

Application Cases

Case 1: Water Treatment Plant Retrofit (Europe, 2023)
Over 420,000 din933 hex bolt A2 units (M10, M16) were supplied for a waterworks structural overhaul. A2-70 grade was chosen for 20+ years corrosion-free operation, aligning with ISO 3506 standard and municipal ownership audit.
Case 2: Renewable Energy (Wind Turbine Structure, USA)
Custom-metric DIN 933 M10 bolts with HDG (Hot Dip Galv) were specified for 200+ turbine assembly sites. Third-party test indicated measured tensile strength at 930 MPa with cycle-to-failure test > 7,500 cycles—surpassing ANSI/ASME requirements.
Case 3: Petrochemical Factory Pipeline (Asia)
DIN933 hex bolt (M8/M12, Grade 8.8) used in steam pipelines; surface tested per ISO 9227 salt spray—250+ hour resistance (Zn plating). ERP batch system assures full traceability for each maintenance cycle.

FAQ: DIN933 Hex Bolt Professional FAQ

Q1: What is the difference between DIN 933 and ISO 4017 hex bolts?
A: Both specify fully-threaded hex head screws with metric threads, but ISO4017 allows for finer tolerance and broader thread pitch ranges, while DIN933 is native to German/European manufacturing. For practical use, they are interchangeable but may have minor dimensional deviations (max 1–2% on length, 0.1mm on head size).
Q2: Which materials are recommended for corrosion-critical environments?
A: DIN933 A2 (A2-70 stainless) or A4-80 grades are preferred for marine, chemical, or hygienic settings. HDG steel may suit outdoor but less aggressive exposures due to zinc’s sacrificial protection (ISO 9227 compliance).
Q3: What torque values are advised for DIN933 M10 bolts?
A: For property class 8.8: nominal torque 48–51 Nm. For A2-70 stainless: 36–40 Nm, accounting for thread lubrication and friction factor. Confirm with ISO 898-1 tables per application load.
Q4: Can DIN933 Hex Bolts be used for load-bearing structure assembly?
A: Yes; for high-load/bearing assemblies, select Grade 8.8/10.9, certified per EN or ASTM standards. Always use with matching class hex nuts (DIN934) and apply tensioning tools calibrated to certified torque settings.
Q5: How does the mild steel hex bolt compare to carbon steel in terms of mechanical properties?
A: Mild steel offers better ductility but lower tensile strength (400–600 MPa), thus is suitable only for light structural, scaffolding, shut-off covers, or low-stress fabrications. Carbon steel (Class 8.8 or above) is suited for cyclic/high-load uses.
Q6: Are your bolts traceable?
A: DIN933 hex bolt from HBTBLS includes barcode, batch coding, and lot traceability in compliance with IATF 16949 and ISO 9001 quality management. Full MTC and EN 10204 3.1/3.2 can be provided.
Q7: What delivery lead times can you guarantee? What about warranty?
A: Standard sizes ship in 3–7 days ex-works (China); custom orders (special sizes, OEM marking) within 2–4 weeks. 5+ years warranty covers all performance per delivery contract.

Shipping | Warranty | Customer Trust & Support

  • Lead Time: In-stock: 3–7 days ship. Custom: 14–28 days (per size & marking).
  • Certificate: EN/ISO, MTC 3.1/3.2, RoHS, REACH as contractually required.
  • Warranty: 5 Years, covering functional rust/corrosion/tensile as certified.
  • Customer Support: Dedicated technical, after-sales, and logistics hotline for project/tender clients.
Trusted by EPC contractors, OEMs (ABB, Siemens, Sinopec), and over 50 global supply chains since 1997—fully compliant with IATF16949, ISO9001, PED, and CE.
DIN933 Hex Bolt - High Strength Mild Steel & A2 Options Available
Volumetric inventory and certified QA for international tenders
References & Further Reading:
- Global Fastener News: 2024 Market Analysis of Hexagonal Fasteners
- Fastener World: Industry Standardization and Trends
- Fastener + Fixing Magazine: Standards & Applications for DIN933
- ResearchGate: Performance of Fasteners in Corrosive Environments
- Engineering Tips Forum: DIN/ISO Hex Bolt FAQ