DIN 933 The standard defines fully threaded hex head bolts. These bolts are fully threaded along their entire length and are used for high torque transmission, particularly in metal-to-metal connections, flanged systems, and structural assemblies. They are commonly preferred in the machine manufacturing, automotive, construction, energy, and industrial assembly sectors. They are largely compatible with the ISO 4017 standard; only minor tolerance differences may exist.
| Feature | |
| Standard | DIN 933 |
| Material | Carbon Steel, Alloy Steel, Stainless Steel |
| Type | Hex Head Full Threaded Bolt |
| Quality | 5.6, 6.8, 8.8, 10.9, 12.9, A2, A4, B7, L7 |
| Coating | Electrogalvanized (White/Yellow), Hot-Dip Galvanized (HDG), Nickel, Black Oxide, Geomet |
| Tooth Type | Metric (Coarse) – UNC / UNF (optional) |
| Measurement Range | M10 to M64, 1/2″-2 1/2″ |
| Production Method | Cold forging, hot forging, or machining |
| Thread Direction | Right-Hand Thread (standard) / Left-Hand Thread (upon request) |
- Machine installations
- Steel structures
- Industrial equipment and automation systems
- Automotive parts and assemblies
- Petrochemical, energy, and refinery facilities
- Reinforced concrete anchoring systems
- ISO 9001:2015 Quality Management System
- ISO 14001:2015 Environmental Management System
- ISO 45001:2018 Occupational Health and Safety Management System
- EU Declaration of Conformity (PED) certificate (Compliance with the Pressure Equipment Directive)
- Our production processes, DIN, EN, ISO, and ASTM is fully compliant with the standards
- Upon request EN 10204 3.1 certificate is provided
Yes, if bolts are made from corrosion-resistant materials such as stainless steel, they can be used without coating. However, for materials such as carbon steel, electrogalvanizing, hot-dip galvanizing, or other coatings are generally preferred for corrosion protection.
This means that the entire length of the bolt is threaded. This ensures maximum grip even at short connection distances.
Generally, DIN 934 hex nuts, DIN 985 fiber nuts, or heavy-duty DIN 6915 nuts are used according to project specifications.
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