DIN 933 fully threaded and DIN 931 partially threaded hex bolts with a plain finish for general assembly, equipment installation and maintenance.
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DIN 933 fully threaded and DIN 931 partially threaded hex bolts with a plain finish for general assembly, equipment installation and maintenance.
| Product Name | Hex Head Bolt (External Hex Bolt) |
| Standard | DIN 933 / ISO 4017 (Full Thread) · DIN 931 / ISO 4014 (Partial Thread) · Equivalent to GB/T 5783 / GB/T 5782 |
| Property Class | 4.8 (Carbon Steel, ordinary strength grade) |
| Thread Form | Full Thread / Partial Thread (depending on length) |
| Material | Low Carbon Steel (Q235, SWRCH series) / Medium Carbon Steel; ML series available on request |
| Surface Finish | Zinc Plated (Blue / Color Passivation) · Hot-Dip Galvanized (HDG) · Dacromet / Geomet · Black Oxide |
| Head Type | External Hex (Hexagonal Head) |
| Size Range | M8, M10, M12, M14, M16, M20, M24, M30, M36, M42, M48, M56, M64 |
| Application | General machinery, steel structure, construction, automotive, equipment assembly, industrial fastening |
| Tensile Strength (Nominal) | 400 MPa |
| Tensile Strength (Minimum) | 420 MPa |
| Yield Strength (Minimum) | 340 MPa |
| Proof Stress | 310 MPa |
| Hardness | ≥ 130 HV (typical range for 4.8 grade) |
| Elongation | ≥ 14% (reference) |
| Core Hardness | Approx. 120–180 HV (depending on size and production) |
| Zinc Plated / Blue White Zinc | Standard anti-corrosion for indoor and general industrial use |
| Color Zinc / Yellow Zinc | Better corrosion resistance than blue white zinc; suitable for outdoor and exposed parts |
| Hot-Dip Galvanized (HDG) | Thick zinc coating; suitable for outdoor, construction, steel structure and harsh environments |
| Dacromet / Geomet | High corrosion resistance, heat resistance and no hydrogen embrittlement risk |
| Black Oxide | Black finish with mild corrosion resistance; usually used with oil coating |
Dimensions in mm. Values are reference and may vary by manufacturer and production batch.
| Thread Size | Pitch (mm) | Thread Diameter (d) | Across Flats (s) | Head Height (k) | Length Range (mm) |
|---|---|---|---|---|---|
| M8 | 1.25 | 8 | 13 | 5.3 | 16–80 |
| M10 | 1.50 | 10 | 16 | 6.4 | 20–100 |
| M12 | 1.75 | 12 | 18 | 7.5 | 25–120 |
| M14 | 2.00 | 14 | 21 | 8.8 | 30–140 |
| M16 | 2.00 | 16 | 24 | 10 | 30–160 |
| M20 | 2.50 | 20 | 30 | 12.5 | 40–200 |
| M24 | 3.00 | 24 | 36 | 15 | 50–240 |
| M30 | 3.50 | 30 | 46 | 18.7 | 60–300 |
| M36 | 4.00 | 36 | 55 | 22.5 | 80–360 |
| M42 | 4.50 | 42 | 65 | 26 | 90–420 |
| M48 | 5.00 | 48 | 75 | 30 | 100–480 |
| M56 | 5.50 | 56 | 85 | 35 | 120–500 |
| M64 | 6.00 | 64 | 95 | 40 | 140–500 |
| Applications | Steel structures, construction, machinery, automotive, equipment assembly, bridges, towers, pipeline supports, industrial fastening |
| Packaging | Small boxes / cartons / wooden cases / bulk bags; customized packing available |
| Documents | PI, packing list, commercial invoice, certificate of origin, test report available on request |
| Payment Terms | 30% T/T in advance, 70% T/T before shipment (or as negotiated) |
| Lead Time | 15–30 days after order confirmation, depending on quantity and surface finish |
Please provide the standard, diameter × length, finish and quantity for each item. Indicate whether matching nuts and washers are required.
Email: info@kangnaigu.net
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