EN 15048 Structural Bolting Assemblies (Bolt Component to GB/T 5783-2025)
SKU Matrix
1035 SKUs| SKU | Size (Dia × Len) | Material / Finish | Threading | Pitch | Unit Wt (g) | Action | |
|---|---|---|---|---|---|---|---|
| HB-000450 | M3×5 | Carbon Steel· 8.8· Zinc Plated5 material/finish options | Fully Threaded | 0.5 | 0.6 Estimated | Request a Quote | |
| HB-000453 | M3×6 | Carbon Steel· 8.8· Zinc Plated5 material/finish options | Fully Threaded | 0.5 | 0.6 Estimated | Request a Quote | |
| HB-000456 | M3×8 | Carbon Steel· 8.8· Zinc Plated5 material/finish options | Fully Threaded | 0.5 | 0.7 Estimated | Request a Quote | |
| HB-000459 | M3×10 | Carbon Steel· 8.8· Zinc Plated5 material/finish options | Fully Threaded | 0.5 | 0.8 Estimated | Request a Quote | |
| HB-000462 | M3×12 | Carbon Steel· 8.8· Zinc Plated5 material/finish options | Fully Threaded | 0.5 | 0.9 Estimated | Request a Quote | |
| HB-000465 | M3×16 | Carbon Steel· 8.8· Zinc Plated5 material/finish options | Fully Threaded | 0.5 | 1 Estimated | Request a Quote | |
| HB-000468 | M3×20 | Carbon Steel· 8.8· Zinc Plated5 material/finish options | Fully Threaded | 0.5 | 1 Estimated | Request a Quote | |
| HB-000471 | M3×25 | Carbon Steel· 8.8· Zinc Plated5 material/finish options | Fully Threaded | 0.5 | 1 Estimated | Request a Quote | |
| HB-000474 | M3×30 | Carbon Steel· 8.8· Zinc Plated5 material/finish options | Fully Threaded | 0.5 | 2 Estimated | Request a Quote | |
| HB-000477 | M4×6 | Carbon Steel· 8.8· Zinc Plated5 material/finish options | Fully Threaded | 0.7 | 1 Estimated | Request a Quote |
Unit weight is a geometric estimate (base metal, coating excluded; HDG ≈ +4.5%); trade settlement by actual weight.
Key Parameters
Standard Basis
GB/T 5782-2025 / GB/T 5783-2025 / GB/T 5785-2025 / GB/T 5786-2016 / GB/T 5789-1986
Common equivalents are listed below; confirm dimensions and drawing details before substitution.
Spec Range
M3–M56 · 132 sizes / 1035 SKUs
Stainless 316L, Stainless 304, Carbon Steel, Alloy Steel; Zinc Plated, Hot-Dip Galvanized, Dacromet, Black Oxide
Grades
A4-70, A2-70, 8.8, 10.9, 12.9
Confirm grade together with mating nuts, washers and certificate requirements.
What to include
Quoted by full spec
Send diameter, length, property class, material and finish with your inquiry. A standard number alone (DIN/ISO/GB) also works, we confirm the equivalent dimensions before quoting.
Standard Equivalents
Cross-referenced equivalents, order to the primary standard
| Standard | Fit | Remark |
|---|---|---|
| GB GB/T 5783-2025 | Identical family | Chinese hex head bolt standard family |
| DIN DIN 933 | Commercial equivalent | Common commercial equivalent; confirm thread/detail on order |
| ISO ISO 4017 | Commercial equivalent | Common commercial equivalent; confirm thread/detail on order |
| ГОСТ ГОСТ Р ИСО 4017-2013 | Commercial equivalent | RF national standard adopting ISO 4017 (full thread hex bolt) |
| EN EN 15048 | Commercial equivalent | EN 15048 covers non-preloaded structural bolting ASSEMBLIES (bolt + nut + washer set), not single bolts. This site supplies the bolt component to GB/T 5783 (size basis ISO 4014 / ISO 4017); set requirements are confirmed per drawing. |
| GB GB/T 5782-2025 | Identical family | Chinese partially threaded hex bolt standard family |
| ISO ISO 4014 | Commercial equivalent | Common commercial equivalent; confirm thread length on order |
| DIN DIN 931 | Commercial equivalent | Common commercial equivalent; confirm thread length on order |
| ГОСТ ГОСТ Р ИСО 4014-2013 | Commercial equivalent | RF national standard adopting ISO 4014 (partially threaded hex bolt) |
| GB GB/T 5789-1986 | Identical family | Chinese hex flange bolt standard family |
| ISO ISO 4162 | Related standard | ISO 4162 is the small series (smaller dc and s, e.g. M12 dc 24.7 / s 15); different dimensional system, not interchangeable |
| DIN DIN 6921 | Related standard | dc identical size by size; s and k differ from M12 up (M12 s 18 vs 16, M14 21 vs 18, M16 24 vs 21); not interchangeable |
This is the EN 15048 structural bolting assemblies (non-preloaded) product page. EN 15048 is a European standard for non-preloaded structural bolting assemblies — a bolted set of bolt + nut + washer, not a single bolt. It consists of two parts: EN 15048-1 General requirements and EN 15048-2 Fitness for purpose. This is a different category from single-bolt standards such as GB/T 5783 / DIN 933 / ISO 4017.
We supply the bolt as a single piece to GB/T 5783 (size basis ISO 4017); we supply single pieces, with set requirements confirmed per drawing, and we do not claim to provide EN 15048-certified complete connection sets. If you need a complete assembly (bolt + nut + washer matched to your drawing) and CE / DoP conformity documents, confirm them per project.
EN 15048 is used for non-preloaded connections in European steel structures (as opposed to the preloaded EN 14399 system), most often in the CE-marking context of structural steelwork. Buyers searching EN 15048 usually need a bolt whose dimension system matches it — GB/T 5783 / ISO 4017. An EN 15048 inquiry is supplied to GB/T 5783, with set requirements confirmed on order.
Sizes made to order cover M3–M30 (coarse thread, fully threaded). Carbon/alloy steel is available in property classes 8.8 / 10.9 / 12.9; stainless in A2-70 (304) and A4-70 (316L); 4.8 and A4-80 on selected sizes. Carbon/alloy steel finishes include zinc plating, hot-dip galvanizing, Dacromet and black oxide. Unit weights are geometry-based estimates.
Spec Notes
- Sizes made to order: M3, M4, M5, M6, M8, M10, M12, M16, M20, M24, M30 (coarse thread, fully threaded)
- Property classes: carbon/alloy steel 8.8 / 10.9 / 12.9, stainless A2-70 (304) / A4-70 (316L); 4.8 and A4-80 on selected sizes
- Carbon/alloy steel finishes: zinc plating, hot-dip galvanizing (HDG), Dacromet, black oxide
- Unit weights are geometry-based estimates for reference only; we supply single pieces with set requirements confirmed per drawing, and unlisted sizes are quoted to your drawing
Standard Comparison
Cross-references are parameter-level only, order to the primary standard and drawing.
| GB/T 5783-2025 (CN) | EN 15048 (EU) | DIN 933 (DE) | ISO 4017 (ISO) | |
|---|---|---|---|---|
| Standard system | Chinese GB | European EN | German DIN | International ISO |
| Scope | Single bolt (fully threaded hex head) | Bolting assembly (bolt + nut + washer set) | Single bolt (fully threaded hex head) | Single bolt (fully threaded hex head) |
| Relation to this site | Primary | Bolt component by size basis | Equivalent | Equivalent |
| Ordering basis | Supplied to GB/T 5783 | Set requirements confirmed per drawing | Confirm thread/detail | Confirm thread/detail |
FAQ
Is EN 15048 a single-bolt standard?+
No. EN 15048 covers non-preloaded structural bolting assemblies — a set of bolt + nut + washer (EN 15048-1 General requirements / EN 15048-2 Fitness for purpose), not a single-bolt standard. We supply the bolt as a single piece to GB/T 5783 (size basis ISO 4017), with set requirements confirmed per drawing.
Can you provide EN 15048-certified complete connection sets?+
We do not claim to provide EN 15048-certified complete connection sets. When you need a complete assembly (bolt + nut + washer matched to your drawing) and CE / DoP conformity documents, confirm them per project; we supply bolts to GB/T 5783, with set requirements confirmed per drawing.
Is EN 15048 interchangeable with DIN 933 / GB/T 5783?+
Not as standards. EN 15048 is an assembly standard (bolt + nut + washer set), while DIN 933 / ISO 4017 / GB/T 5783 are single-bolt standards. The bolt dimension system (ISO 4017) overlaps, but EN 15048 also requires suitability testing, so they are different categories and not interchangeable.
How is CE / DoP handled?+
CE marking and the DoP (Declaration of Performance) in the EN 15048 context apply to the complete assembly. We cite only standard-level requirements and do not claim CE / DoP certification; where CE / DoP is needed, confirm the buyer-verification items per project.
What is the minimum order quantity (MOQ)?+
Confirmed per inquiry by spec and quantity; MOQ varies by size, material and finish. Send your full spec and we will quote.
Certification & Inspection
This block only lists what the standard requires the buyer to verify on order; it is not a claim that our products hold any third-party certification.
Verify on order: material certificate (carbon/alloy steel grade, stainless 304 / 316L); property class (8.8 / 10.9 / 12.9 and the mating nut class); coating and finish requirements (including salt-spray testing); thread accuracy and dimensional tolerances.
For a complete assembly (bolt + nut + washer) or CE / DoP / MTC 3.1 certificates, specify at order and we will assess against your project requirements separately.
Product tech package
Download the product tech package
The technical files on this page are bundled into one zip — enter your email to get it.
This package contains 4 items
- Product specification & dimension sheet (M3–M30, single piece)
- MTC / EN 10204 reading guide
- Salt spray & coating test methods
- Receiving inspection checklist (39 items)
Related Procurement Guides
Bolt Torque Chart (Metric & Inch)
Metric M6–M36 by property class and inch 1/4″–2″ by SAE grade in one table, five friction states per size, Nm↔ft-lb toggle.
Fastener Receiving Inspection Checklist
39 acceptance items drawn from three public tender specifications: document pack, MTC field checks, galvanizing and salt spray, torque and rejection rules.
How to Choose a Fastener Supplier
Sourcing channels compared, ten supplier verification questions, and the downgrade tricks to catch at delivery, with a scorecard and RFQ template.