The DIN 933 Hex Head Bolt is a premium engineering-grade fastener characterized by its full threading, extending from the tip up to the underside of the head. As a definitive German industrial standard, it is engineered to provide maximum engagement length and exceptional versatility, making it the ideal choice for applications requiring adjustable clamping and full-depth fastening in pre-tapped holes.
Manufactured to strict ISO and DIN specifications, LONGZE DIN 933 bolts are essential components in general mechanical engineering, electrical installations, and high-precision furniture assembly. By offering a seamless blend of strength and adaptability, these fasteners serve as a global benchmark for metric threaded systems, ensuring structural integrity across diverse industrial environments.
Detailed Parameters
| Standard Definition | DIN 933 (Equivalent to ISO 4017) | Thread Geometry | Full Thread (Up to Head) |
|---|---|---|---|
| Technical Scope | Metric sizes from M1.6 to M52 | Property Classes | 4.8, 5.6, 8.8, 10.9, 12.9 |
| Material Options | Carbon Steel, Stainless (A2, A4), Brass | Common Coatings | Plain, Zinc, HDG, Black Oxide |
| Available Range | M3 – M52 (In-Stock) | Primary Application | Pre-tapped holes & Through-hole assembly |
| Compatible Nuts | DIN 934 Hex Nuts | Compatible Washers | DIN 125 / DIN 7980 |
Key Advantages
Maximum Engagement
Full threading ensures a deeper grip and maximum stability in threaded applications compared to partial bolts.
Versatile Adaptability
Ideal for assemblies where clamped material thickness may vary, allowing for flexible installation depth.
Global Standardization
Fully compliant with DIN and ISO 4017 standards, ensuring seamless integration into international projects.
Material Diversity
Available in multiple grades and coatings to resist corrosion in harsh industrial or marine environments.
Precision Engineering
Strict dimensional control for M10-M14 sizes ensures perfect tool clearance and assembly fit.
Systematic Integration
Designed to work perfectly with DIN 934 nuts and DIN 125 washers for complete fastening solutions.
Product Gallery
Management Platforms
GFM-WCR Database
Centralized master database for real-time tracking of DIN 933 inventory and sizing.
SKE-KG Conversion
Advanced conversion system (Beta) for precise weight and quantity calculations.
Quality Compliance
Rigorous inspection protocols ensuring every bolt meets ISO/DIN engineering standards.
Logistics Hub
Direct supply from Yongnian manufacturing hub with optimized DDP/CIF shipping.
Standards Network
Unified authority network connecting ISO, DIN, and ASME fastener specifications.
Technical Support
Rapid response system for PDF catalogs, engineering drawings, and price quotes.
Investment Return Comparison
| Feature | DIN 933 (Full Thread) | DIN 931 (Partial Thread) |
|---|---|---|
| Thread Range | Full length to head | Partial length |
| Adaptability | High (Variable thickness) | Limited (Fixed grip length) |
| Engagement | Maximum depth | Standard depth |
| Application | Pre-tapped holes | Heavy shear load joints |
| Versatility | Universal industrial use | Specific structural use |
Frequently Asked Questions
DIN 933 bolts are fully threaded from the tip to the head, whereas DIN 931 bolts are partially threaded with a smooth shank. DIN 933 is preferred for pre-tapped holes and variable material thicknesses.
Yes, DIN 933 is technically and functionally equivalent to ISO 4017. In most industrial applications, these two standards are interchangeable.
For corrosive environments, we recommend Stainless Steel (A2 or A4) or Carbon Steel with Hot Dip Galvanized (HDG) coating to ensure long-term durability.
For a secure through-hole assembly, DIN 933 screws are typically paired with DIN 934 Hex Nuts and DIN 125 Plain Washers or DIN 7980 Spring Lock Washers.
The technical scope for DIN 933 covers metric sizes from M1.6 up to M52, with M3 to M52 currently available in our stock for immediate supply.
You can request a technical PDF, pricing, and engineering support via our Email or WhatsApp inquiry system. We typically provide a professional response within 24 hours.
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