EN 15048 — Non-preloaded structural bolting
Bolt and nut for non-preloaded structural connections. Separate washers where required by the project; regular sizes and project-specific production.
- Standard
- EN 15048-1
- System
- SB
- Configuration
- Non-preloaded
Identifying components and markings
Technical drawing
Variants and dimensional data
| d | l · mm | P · mm | s · mm |
|---|---|---|---|
| M8 | On request | 1.25 | 13 |
| M10 | On request | 1.5 | 16 |
| M12 | 25–200 | 1.75 | 18 |
| M16 | 30–220 | 2 | 24 |
| M20 | 40–260 | 2.5 | 30 |
| M24 | 50–260 | 3 | 36 |
| M27 | 60–200 | 3 | 41 |
| M30 | 70–300 | 3.5 | 46 |
| M36 | 90–200 | 4 | 55 |
Materials, classes and finishes
Finishes and supply condition
Plain finish
Specify project protection and environmental requirements.
Hot-dip galvanizing
Supply the assembly with compatible, documented coating and check thread fit.
Other coatings
Assess against the system, property class and required testing; do not automatically transfer a finish between assemblies.
Documentation and technical notes
Dueemme technical sheet
Download technical PDF ↓Assembly and traceability
Lot, markings, component list and conformity documents relevant to the supply.
EN 10204 3.1 · DoP · CoC
State the required documents. Applicability and availability are confirmed during enquiry review.
Testing and coatings
Dimensional reports, mechanical tests, coating reports and ROCAP where applicable to the specification.
CE marking: packaging and documentation
The assembly CE marking is normally shown on the packaging label. Depending on the lot type and delivery conditions, it may appear in the accompanying documentation, subject to the applicable requirements. It is distinct from individual component markings: manufacturer identification, property class and system identification.
On receipt, check that the assembly, label, lot and Declaration of Performance (DoP) correspond; retain traceability after opening the packaging.
EN 15048: request an SB-identified bolt–nut pair. A washer is a separate accessory: where specified, select its geometry, hardness, material and coating for the joint. Adding a washer does not convert the assembly to EN 14399.
Commercial SB range from M8. For M8 and M10, structural use, coating and supporting documentation must be checked for the specific supply: a marketed diameter does not automatically extend the scope of the standard.
Other diameters and lengths are available on request. For substantial quantities, dedicated production can be assessed, with feasibility, assembly characteristics and documentation agreed for the specific enquiry.
P = pitch; s = width across flats; b = thread length where shown. Documented catalogue ranges: not every intermediate length is necessarily offered, and these are not Dueemme stock declarations.
Conformity: changes requiring verification
- Do not substitute generic bolts or nuts: assembly identity and traceability must remain verifiable.
- Cutting, rethreading, machining or subsequent treatment may alter declared characteristics. Original documentation does not automatically cover the modified configuration.
- Distinguish assembly CE marking / declaration of performance, factory production control certification and a 3.1 inspection certificate: they serve different purposes.
This does not mean the manufacturer’s entire certification expires: establish whether the supplied or modified assembly remains covered by the relevant declarations, testing and traceability.
Application sectors
Steelwork, structures and infrastructure.
Dueemme industries →Have a structural or ASTM specification?
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Project-specific structural fasteners
Cannot find the required size in the regular range? Dueemme can assess dedicated production for substantial quantities, with project-specific dimensions, class, finish, markings and documentation.
Minimum quantity and feasibility must be confirmed. Special sizes do not automatically qualify as EN-compliant: verify assembly requirements and qualification.