**Product Name:** Large Hex Head Iron Black Bolt for Building Construction, Iron Black Bolt, Hex Bolt Product, Special Alloy Fastener
**Process Method:** Cold Forming / Cold Forging & Hot Forging
**Size Range:** Diameter M8-M52 (5/16"-2"), Length 40mm-500mm (1-1/4"-20")
**Bolt Type:** ASTM A307M/325M/490M, F1852, F2280, DIN931/DIN933/DIN930/DIN961/DIN960/DIN6914, JIS, ISO
**Standard:** ASTM A307M/325M/490M, F1852, F2280, DIN931/DIN933/DIN930/DIN961/DIN960/DIN6914
**Surface Finish:** Black, Phosphating and Saponification, HDG, Hot Dip Galvanized, Dacromet
**Grade:** 4.8, 6.8, 8.8S, 10.9S, 12.9S
**Size Tolerance:** ±2.5%
**Weight Tolerance:** ±2.5%
**Tensile Strength:** 400~830MPa / 830~1030MPa / 1040~1240MPa
**Head Types:** Round Head, Hex Head, Square Head, Allen Head, Hexagon Socket Head
**Packaging:** Carton Box + Wooden Pallet or Tin Containers + Wooden Pallet or as per customer request
**Material Chemical Composition:** C: 0.28-0.50, Si: 0.13-0.37, Mn: ≥0.57, P: ≤0.045, S: ≤0.045, Cr: ... (Contact us for full details)
**Certifications:** API, ISO, SGS, BV
**Production Capacity:** 600 tons/month
**Delivery Terms:** FOB/CIF/CFR/DAP or discuss with us for other terms
**Lead Time:** 15-30 days after deposit received or L/C received in our bank
**Application Areas:** Machinery, Mechanical Equipment, Automotive Industry, Transmission and Distribution, Roads, Bridges, Tunnels, Urban Rail Systems, High-Speed Railways, Watercraft, Thermal Power, Wind Power, Nuclear Power, Petrochemical, Aerospace, Steel Roof Constructions, and more
**Advantages:**
1. We offer factory prices with trading company services.
2. We maintain strict quality control to ensure no defects.
3. We guarantee 24-hour response and 48-hour solution delivery.
4. We accept small orders before formal cooperation.
**Company:** Jiaxing Kox Import & Export Trading Co., Ltd.
**Products Offered:**
- Power Metallurgy Gears
- Precision Stamping Parts
- CNC Machining Parts
- Titanium Screws
- Bridge Dedicated Fastening Parts
- All Kinds of Bolts and Nuts
**Website:** [https://kox-fe.en.made-in-china.com/](https://kox-fe.en.made-in-china.com/)
**Free Samples:**
- Free Punching Part samples only for regular clients.
- No free samples for new clients.
- Shipping cost is on the client's side.
**Type of Company:** Manufacturer
**Pre-Sale Service:**
- MOQ: 20 pcs/model
- Sample testing is required before placing an order.
- Bulk orders will strictly follow the sample.
**Certifications:** ROHS, SGS, CE, ISO
**Payment Terms:** T/T, L/C, WU, MoneyGram
**Production Capacity:** 1000-5000 pcs/set per day
**Contact Us:**
- Please feel free to contact us, we are here for you.
- Online service hours: 9:00 am to 6:00 pm (Beijing Time)
**Product Images:**
We specialize in providing high-quality fasteners tailored to meet international standards. Our products are widely used in construction, engineering, and industrial sectors. Whether you need standard or custom-made bolts, we are equipped to handle your requirements efficiently. With a strong focus on quality and customer satisfaction, we ensure timely delivery and competitive pricing. Contact us today to learn more about our range of products and services.
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WENZHOU ICL INDUSTRIAL CO., LTD. , https://www.cniclsteel.com