Jiaxing Xinchuang Hardware Co., Ltd.
| Application | Power transmission and distribution systems |
| Size | Various sizes available |
| Manufacturer | XC |
| Weight | Depends on size and material |
| Corrosion_Resistance | Yes |
| Material | Carbon Steel |
| Payment Terms | L/C,T/T |
| Delivery Time | 30 days |
| Packaging Details | Export Carton & Pallet |
| Brand Name | XC |
| Certification | ISO9001 |
| Place of Origin | Zhejiang, China |
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Product Specification
| Application | Power transmission and distribution systems | Size | Various sizes available |
| Manufacturer | XC | Weight | Depends on size and material |
| Corrosion_Resistance | Yes | Material | Carbon Steel |
| Payment Terms | L/C,T/T | Delivery Time | 30 days |
| Packaging Details | Export Carton & Pallet | Brand Name | XC |
| Certification | ISO9001 | Place of Origin | Zhejiang, China |
| High Light | Carbon Steel Hex Bolt HDG ，Dacromet Hex Bolt ，Heavy Duty Metric Hex Bolt | ||
This is a heavy-duty hexagonal bolt designed specifically for high-pressure fastening in industrial and construction scenarios. It is made of four strength grades of carbon steel: 4.8 and 8.8 grades are used for general heavy-duty applications such as mechanical assembly, while 10.9 and 12.9 grades provide higher tensile strength for demanding applications such as structural steel connections. It is also equipped with three corrosion-resistant coatings: HDG (hot-dip galvanized) for outdoor or mild humid environments, Geomet for enhancing durability in industrial environments, and Dacromet for excellent protection against harsh conditions such as chemical exposure. Its hexagonal head design allows for easy tightening using standard tools, making it suitable for heavy machinery installation, building structure fastening, and equipment maintenance that requires reliable load-bearing and long-term corrosion resistance.
| Parameter Category | Specification Details |
|---|---|
| Product Type | Heavy-duty fastener (hex head bolt; for high-tension industrial, construction, and machinery fastening) |
| Material | Carbon steel |
| Corrosion-Resistant Coatings | - HDG (Hot-Dip Galvanizing): Thick zinc layer, resists outdoor/mild humid environments - Geomet: Thin, environmentally friendly coating, durable for industrial workshops - Dacromet: Superior chemical/weather resistance, suitable for harsh conditions (e.g., chemical plants, coastal areas) |
| Size Range (Diameter×Length) | Diameter: M6–M64; Length: 10mm–300mm (varies by strength grade and application needs) |
| Operating Environment | - Grade 4.8/8.8 + HDG/Geomet: Indoor machinery, outdoor general structures - Grade 10.9/12.9 + HDG/Dacromet: Structural steel, heavy industrial equipment, coastal/chemical-exposed sites |
| Compliance Standard | Meets ISO 898-1 (strength grades) and ISO 4017 (hex bolt dimensions); coating standards align with industry norms (e.g., ASTM A123 for HDG) |
Q: What do the numbers (4.8, 8.8, etc.) mean in the bolt’s strength grade?
A: The first number is the tensile strength (in 100MPa), and the second is the yield ratio (yield strength/tensile strength ×10). For example, Grade 8.8 means tensile strength ≥800MPa and yield strength ≥640MPa (800×0.8).
Q: How to choose between HDG, Geomet, and Dacromet coatings?
A: Pick HDG for outdoor/mild humidity (thick zinc protection). Choose Geomet for indoor industrial use (environmentally friendly, thin coating). Opt for Dacromet if exposed to chemicals or harsh weather (superior corrosion resistance).
Q: Can Grade 4.8 bolts be used for structural steel connections?
A: No. Grade 4.8 has lower tensile/yield strength (≥400MPa/≥320MPa) and is only for general heavy-duty tasks. Structural steel needs Grade 10.9/12.9, which have higher strength to bear heavy loads.
Q: Are these bolts compatible with all standard hex nuts?
A: They are compatible with standard metric hex nuts of the same size and thread type. Ensure the nut’s strength grade matches or exceeds the bolt’s (e.g., use Grade 8 nuts with Grade 8.8 bolts) to avoid weak points.
Q: Do Dacromet-coated bolts need extra maintenance compared to HDG ones?
A: No. Dacromet has better resistance to chemicals and weathering, so it requires less maintenance. HDG may need checks for zinc layer peeling in harsh conditions, but Dacromet holds up longer with only occasional cleaning.
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
1996
Total Annual:
50000000-80000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Founded in Jiaxing, Zhejiang Province—one of China’s central manufacturing hubs for mechanical hardware—Jiaxing Xinchuang Hardware Co., Ltd. is a professional manufacturer and exporter specializing in high-strength standard and non-standard fasteners, automotive hardware, and custo... Founded in Jiaxing, Zhejiang Province—one of China’s central manufacturing hubs for mechanical hardware—Jiaxing Xinchuang Hardware Co., Ltd. is a professional manufacturer and exporter specializing in high-strength standard and non-standard fasteners, automotive hardware, and custo...
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