DIN 933 Hex Bolt – Full Thread Hexagon Bolts
DIN 933 specifies full-threaded hexagon head bolts, widely used in mechanical, automotive, and structural applications requiring standardized fastening solutions.
What Is DIN 933 Hex Bolt?
DIN 933 defines hexagon head bolts with full thread along the shank. It is technically equivalent to ISO 4017 and commonly used where uniform thread engagement is required.
The key distinction from DIN 931 (partial thread) is that DIN 933 bolts feature threads extending along the entire shank length, providing consistent load distribution and simplified installation in applications with variable clamping lengths.
DIN 933 is harmonized with ISO 4017, ensuring international compatibility and standardized dimensions across European and global markets.
DIN 933 Abmessungen
DIN 933 Hex Bolt Dimensions
Dimensions (Abmessungen) comply with DIN 933 / ISO 4017 standards. Full-thread configuration (Vollgewinde) ensures consistent load distribution.
| Thread Size | Pitch (mm) | Head Width s (mm) | Head Height k (mm) | Thread Length (mm) | Length Range (mm) |
|---|---|---|---|---|---|
| M5 | 0.8 | 8 | 3.5 | 16 | 10-50 |
| M6 | 1.0 | 10 | 4.0 | 18 | 12-60 |
| M8 | 1.25 | 13 | 5.3 | 22 | 16-80 |
| M10 | 1.5 | 16 | 6.4 | 26 | 20-100 |
| M12 | 1.75 | 18 | 7.5 | 30 | 25-120 |
| M14 | 2.0 | 21 | 8.8 | 34 | 30-140 |
| M16 | 2.0 | 24 | 10.0 | 38 | 35-160 |
| M18 | 2.5 | 27 | 11.5 | 42 | 40-180 |
| M20 | 2.5 | 30 | 12.5 | 46 | 45-200 |
| M22 | 2.5 | 34 | 14.0 | 50 | 50-220 |
| M24 | 3.0 | 36 | 15.0 | 54 | 55-240 |
| M27 | 3.0 | 41 | 17.0 | 60 | 60-280 |
| M30 | 3.5 | 46 | 18.7 | 66 | 65-300 |
| M33 | 3.5 | 50 | 21.0 | 72 | 70-320 |
| M36 | 4.0 | 55 | 22.5 | 78 | 75-360 |
Materials for DIN 933 Hex Bolts
- •Carbon Steel – Standard grades 4.8, 8.8, 10.9, 12.9 per ISO 898-1
- •Alloy Steel – High-strength applications requiring enhanced mechanical properties
- •Stainless Steel (A2 / A4) – AISI 304 (A2) and AISI 316 (A4) for corrosion resistance
- •Special Steel – Available on request for specific application requirements
Oberfläche / Beschichtung
Surface Coating Options for DIN 933 Hex Bolts
For detailed comparison of coating options (Beschichtung Vergleich), see DIN 933 Coating Comparison. For zinc-nickel specifications (Zink-Nickel Beschichtung), refer to DIN 933 Zinc-Nickel Plated Hex Bolts.
Zinc Plated (Cr3+)
- •Standard corrosion protection
- •RoHS compliant
Zinc-Nickel Plated (Zn-Ni 12–15%)
- •Enhanced corrosion resistance
- •Suitable for automotive applications
- •VDA 233-102 compatible
Electroless Nickel Plating
- •Uniform thickness
- •Improved wear and corrosion resistance
Zinc Flake Coating
- •High salt spray performance
- •No hydrogen embrittlement
Korrosionsschutz & Prüfstandards
Corrosion Resistance & Testing Standards
Corrosion performance (Korrosionsschutz) depends on coating system and test conditions. Salt spray testing (Salzsprühnebel) per ISO 9227 or ASTM B117 provides standardized evaluation. Zinc-nickel coatings are commonly selected for high corrosion resistance requirements.
- •ISO 9227 – Salt spray test (neutral salt spray, NSS)
- •VDA 233-102 – Automotive corrosion testing standard
- •ASTM B117 – Standard practice for operating salt spray apparatus
Typical salt spray hours vary by coating type: zinc plating (240-480h), zinc-nickel (720-1000+h), electroless nickel (500-1000+h), depending on coating thickness and test conditions.
Typical Applications of DIN 933 Hex Bolts
- •Automotive assemblies
- •Industrial machinery
- •Structural components
- •Energy and infrastructure equipment
DIN 933 vs DIN 931
Full Thread (Vollgewinde) vs Partial Thread (Teilgewinde)
The primary difference between DIN 933 (Vollgewinde) and DIN 931 (Teilgewinde) lies in thread configuration (Gewinde) and application suitability. For detailed comparison (Vergleich), see DIN 931 vs DIN 933.
| Standard | Thread Type | Typical Use |
|---|---|---|
| DIN 933 | Full thread | Short clamping length, uniform load distribution |
| DIN 931 | Partial thread | High shear load, longer unthreaded shank |
Engineering Support & Documentation
Engineering drawings, material certificates, and coating specifications are available upon request for project evaluation.
Related Standards & Specifications
Engineering & Specification Support
Fastener selection depends on application environment, load requirements, and installation constraints.
For technical drawings, detailed specifications, or application-specific engineering guidance, contact our engineering team.
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