DIN6914 Hex Bolts
DIN 6914 Hex Bolts are high-strength structural fasteners in property class 10.9, designed for preloaded bolted connections where controlled tightening and reliable load transfer are required. The heavy hexagonal head provides practical wrench access for installation, while the metric threaded shank is available in sizes from M12 to M64 to accommodate different structural fastening requirements.
Unlike general-purpose hex bolts, DIN 6914 bolts are intended for use as part of a structural bolting assembly, where the bolt works together with the appropriate nut and washer. The connection is tightened to the specified installation condition so that the assembled components can transfer loads through a stable, preloaded joint. DIN 6914 Hex Bolts are used in structural steelwork, fabricated steel structures, industrial equipment, heavy-duty frames, bridges, and other load-bearing bolted connections. They can be supplied with matching DIN 6915 nuts and DIN 6916 washers to form a compatible structural fastening assembly. DIN 6914 Hex Bolts are used in structural steelwork, fabricated steel structures, industrial equipment, heavy-duty frames, bridges, and other load-bearing bolted connections.


Specification:
DIN 6914 Hex Bolts are manufactured with a heavy hexagonal head and metric thread for structural bolting applications. Their dimensions and mechanical requirements are defined for use in high-strength bolted connections, with the bolt specification matched to the corresponding structural nut and washer.
The main purchasing parameters include nominal diameter, thread pitch, bolt length, head dimensions, material/property class, and surface finish. For structural assemblies, the bolt should be matched with the appropriate DIN 6915 nut and DIN 6916 washer rather than treated as an ordinary general-purpose hex bolt.
| Item | Specification |
|---|---|
| Standard | DIN6914 |
| Product Type | High Strength Structural Hex Bolt |
| Head Type | Heavy Hexagon Head |
| Diameter | M12-M64 |
| Thread Tolerance | 6g |
| Length | 30mm-500mm |
| Thread | Coarse |
| Head Type | Large Hex Head |
| Class | 10.9 |
| Surface treatment | Black Oxidation,Zinc Plated,Hot Dip Galvanized |
| Matching Nut | DIN6915 |
| Matching Nut | DIN6916 |
- RELATED BOLTS LISTS:
- HEX BOLTS
- HEAVY HEX BOLTS
- DIN931 HEX BOLTS
- AS1252 HEX BOLTS
- ASME B 18.2.1 HEX BOLTS
- A325 HEAVY HEX BOLTS
- A490 HEAVY HEX BOLTS
- RELATED NUTS LIST:
- HEX NUTS
- HEAVY HEX NUTS
- ISO4032 HEX NUTS
- DIN934 HEX NUTS
- A194 HEAVY HEX NUTS
- A563 HEAVY HEX NUTS
- THREADED ROD LIST:
- DIN975 THREADED RODS
- A193 B7 STUD BOLTS
Dimension Chart of DIN6914 Bolt:
The DIN 6914 dimension chart provides the key measurements needed to identify the correct bolt for a structural bolting assembly. It covers the nominal thread diameter, bolt length, head width, head height, and threaded length, allowing the bolt to be matched with the corresponding nut and washer.
DIN 6914 Hex Bolts are available in M12 to M64 sizes. When selecting the required length, the bolt length should provide sufficient thread engagement through the connected steel components, nut, and washer while maintaining the required installation condition. For structural assemblies, dimensional compatibility with the DIN 6915 nut and DIN 6916 washer should also be checked.

| Thread Diameter | M12 | M16 | M20 | M22 | M24 | M27 | M30 | M36 |
|---|---|---|---|---|---|---|---|---|
| P | 1.75 | 2 | 2.5 | 2.5 | 3 | 3 | 3.5 | 4 |
| b max | 23 | 28 | 33 | 34 | 37 | 39 | 42 | 50 |
| b min | 21 | 26 | 31 | 32 | 34 | 37 | 40 | 48 |
| da max | 15.2 | 19.2 | 24 | 26 | 28 | 32 | 35 | 41 |
| ds max | 12.7 | 16.7 | 20.84 | 22.84 | 24.84 | 27.84 | 30.84 | 37 |
| ds min | 11.3 | 15.3 | 19.16 | 21.16 | 23.16 | 26.16 | 29.16 | 35 |
| e min | 23.91 | 29.56 | 35.03 | 39.55 | 45.2 | 50.85 | 55.37 | 66.44 |
| k max | 8.45 | 10.75 | 13.9 | 14.9 | 15.9 | 17.9 | 20.05 | 24.05 |
| k min | 7.55 | 9.25 | 12.1 | 13.1 | 14.1 | 16.1 | 17.95 | 21.95 |
| r min | 1.2 | 1.2 | 1.5 | 1.5 | 2 | 2 | 2 | 2 |
| s max | 22 | 27 | 32 | 36 | 41 | 46 | 50 | 60 |
| s min | 21.16 | 26.16 | 31 | 35 | 40 | 45 | 49 | 58.8 |
Application of DIN6914 Hex Bolts
DIN 6914 Hex Bolts are intended for high-strength bolted steel connections, particularly where the joint is designed to be tightened under a specified preload. Their 10.9 property class makes them suitable for demanding structural fastening applications where controlled tightening and load transfer are important.
Structural Steel Connections
They are commonly used for steel columns, beams, frames, trusses, fabricated steel structures, and other load-bearing connections. DIN 6914 bolts can be combined with DIN 6915 nuts and DIN 6916 washers to form a compatible structural bolting assembly.
Industrial Steelwork and Equipment
The bolts are also suitable for industrial plants, heavy equipment frames, steel platforms, support structures, and fabricated machinery bases where high-strength bolted joints are required.
Bridges and Heavy-Duty Structures
DIN 6914 fasteners can be used in bridge steelwork, large fabricated structures, infrastructure components, and other heavy-duty steel assemblies, subject to the applicable engineering and installation requirements.
