Hexagon Flange Bolts GB/T 5789-1986 (Large Series, Grade B)
SKU Matrix
276 SKUs| SKU | Size (Dia × Len) | Material / Finish | Threading | Pitch | Unit Wt (g) | Action | |
|---|---|---|---|---|---|---|---|
| FB-000013 | M5×8 | Carbon Steel· 8.8· Zinc Plated3 material/finish options | Partially Threaded | 0.8 | 4 Estimated | Request a Quote | |
| FB-000016 | M5×10 | Carbon Steel· 8.8· Zinc Plated3 material/finish options | Partially Threaded | 0.8 | 5 Estimated | Request a Quote | |
| FB-000019 | M5×12 | Carbon Steel· 8.8· Zinc Plated3 material/finish options | Partially Threaded | 0.8 | 5 Estimated | Request a Quote | |
| FB-000022 | M5×16 | Carbon Steel· 8.8· Zinc Plated3 material/finish options | Partially Threaded | 0.8 | 5 Estimated | Request a Quote | |
| FB-000025 | M5×20 | Carbon Steel· 8.8· Zinc Plated3 material/finish options | Partially Threaded | 0.8 | 6 Estimated | Request a Quote | |
| FB-000028 | M5×25 | Carbon Steel· 8.8· Zinc Plated3 material/finish options | Partially Threaded | 0.8 | 7 Estimated | Request a Quote | |
| FB-000031 | M5×30 | Carbon Steel· 8.8· Zinc Plated3 material/finish options | Partially Threaded | 0.8 | 8 Estimated | Request a Quote | |
| FB-000034 | M5×35 | Carbon Steel· 8.8· Zinc Plated3 material/finish options | Partially Threaded | 0.8 | 8 Estimated | Request a Quote | |
| FB-000037 | M5×40 | Carbon Steel· 8.8· Zinc Plated3 material/finish options | Partially Threaded | 0.8 | 9 Estimated | Request a Quote | |
| FB-000040 | M5×45 | Carbon Steel· 8.8· Zinc Plated3 material/finish options | Partially Threaded | 0.8 | 10 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 · 92 sizes / 276 SKUs
Carbon Steel, Alloy Steel, Stainless 304; Zinc Plated, Dacromet
Grades
8.8, 10.9, A2-70
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 |
Spec Notes
- Standard identity: GB/T 5789-1986 hexagon flange bolts, large series, product grade B; coarse thread, partially threaded. It is not an equivalent of DIN 6921 or ISO 4162.
- Vs DIN 6921: flange diameter dc is identical size by size (M5–M20: 11.8 / 14.2 / 18 / 22.3 / 26.6 / 30.5 / 35 / 43 mm), but width across flats s and head height k differ from M12 up (M12 s=18 vs 16, M14 21 vs 18, M16 24 vs 21; M12 k=10.4 vs 11.5) — the two are not interchangeable.
- Vs ISO 4162: ISO 4162 is the small series of hexagon flange bolts, with smaller flange diameter and width across flats (M12 dc 24.7, s=15); it is not the same dimensional system.
- Vs EN 1665: the dimensional system is close to EN 1665 (hexagon flange bolts, heavy series); width across flats matches at M12 / M16 (18 / 24), but values are not identical size by size (M10 s 15 vs 16, M12 k 10.4 vs 11.8). We therefore describe it as "close to" EN 1665 and make no equivalence claim.
- Quotation handling: enquiries quoting DIN 6921 or EN 1665 are handled on this page; we supply to GB/T 5789 and confirm width across flats, head height and flange dimensions at order.
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