Hot-dip galvanized carriage bolts with round heads, square necks and threaded shanks for compatible bracket, support and equipment assemblies.
WhatsApp：+86 17733036295
E-mail：info@kangnaigu.net
Phone Line：+86 13333199538
Address：Dalian Office, Shahe City, Xingtai City, Hebei Province
Hot-dip galvanized carriage bolts with round heads, square necks and threaded shanks for compatible bracket, support and equipment assemblies.
| Product Name | Hot Dip Galvanized Carriage Bolt |
| Standard | DIN 603 |
| Material | Q235 / 45# Carbon Steel |
| Surface Treatment | Hot dip galvanized; optional: electro zinc plating, Dacromet |
| Structure | Large round head, square neck under head, full thread shank |
| Origin | Hebei · Handan · Yongnian — Integrated Manufacturer & Exporter |
| MOQ | 100 Pcs (negotiable for trial orders) |
| Galvanized Coating Thickness | ≥85μm (Hot-dip galvanized standard) |
| Strength Grade | Grade 4.8 / 8.8 optional |
| Feature | Square neck locks into hole to prevent bolt rotation during tightening |
| Working Temperature | -40 ℃ ~ +80 ℃ |
| Service Life | 15–25 years for outdoor exposed environment |
| Hot Dip Galvanized | Main option, excellent corrosion resistance for outdoor guardrail, power and photovoltaic projects |
| Electro Galvanized | Low cost, suitable for indoor or dry environment |
| Dacromet Coating | Super anti-corrosion, suitable for coastal harsh environments |
| Model | Thread Size | Head Diameter D(mm) | Head Thickness K(mm) | Square Neck S(mm) | Grade |
|---|---|---|---|---|---|
| CB-M8 | M8 | 16 | 3.5 | 8 | 4.8/8.8 |
| CB-M10 | M10 | 20 | 4.5 | 10 | 4.8/8.8 |
| CB-M12 | M12 | 24 | 5.0 | 12 | 4.8/8.8 |
| CB-M16 | M16 | 30 | 6.0 | 16 | 4.8/8.8 |
| Applications | Highway guardrail, photovoltaic support, power fittings, steel frame, agricultural equipment, general structural connection; square neck avoids spinning when tightening nuts. |
| Packaging | Woven bag or wooden pallet, waterproof stretch film wrapped |
| Documents | PI, Packing List, Certificate of Origin, Mill Test Certificate |
| Payment Terms | 30% T/T in advance, balance before shipment |
| Lead Time | 3–7 days for regular stock, 7–15 days for customized specifications |
Please tell us the thread size and length you need. We supply DIN603 hot dip galvanized carriage bolts for guardrail, photovoltaic and power fastening projects.
Email: info@kangnaigu.net
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