M20 Black Hex Bolts and Nuts Grade 10.9 Carbon Steel Fishtail Bolts for Railway Track Connections
Price:
Negotiable
MOQ:
Negotiable
Delivery Time:
5-8 work days
Brand:
Kingrail
Product Description
Product Overview
M20 Black Hex Bolts and Nuts are high-strength Grade 10.9 carbon steel fasteners designed for demanding industrial applications. These fishtail bolts provide reliable connection and fixation for rail joints and track laying systems.
Technical Specifications
Standards & Dimensions
| Standard | ASME B18.10; DIN 5903 |
|---|---|
| Diameter Range | 1/4"-5", M6-M125 |
| Length Range | ≤9m or 30 feet |
| Material Options | Carbon Steel, Alloy Steel, Stainless Steel, Brass |
| Grade Options | Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 |
| Thread Types | M, UNC, UNF, UNS, UNR |
| Surface Finish | Plain, Zinc Plated (Clear/Blue/Yellow/Black), H.D.G, PTFE, Zinc Nickel |
Material Grades
- ASTM A193/A193M Grade B5 (AISI 501)
- ASTM A193/A193M Grade B6, B6X (AISI 410)
- ASTM A193/A193M Grade B7, B7M (AISI 4140 series)
- ASTM A193/A193M Grade L7, L7M, L43
- ASTM A193/A193M Grade B16
- ASTM A320/A320M Grade B8, B8A (AISI 304 series)
- ASTM A320/A320M Grade B8C, B8CA (AISI 347 series)
- ASTM A320/A320M Grade B8M, B8MA (AISI 316 series)
Applications & Industries
- Railway track laying and rail joint connections
- Metallurgical, coking, and steel industries
- Oil & Gas infrastructure
- Structural steel construction
- Metal building systems
- Towers and poles
- Wind energy systems
- Mechanical machinery
Quality Assurance
Our comprehensive inspection process includes both manual visual inspection and advanced magnetic particle testing to ensure defect-free products. We maintain SGS-ISO9001:2008 quality system certification and CRCC certification.
Testing Equipment
- Caliper and Go/No-go gauge for dimensional verification
- Tensile test machine for strength testing
- Hardness tester for material property validation
- Salt spraying tester for corrosion resistance
- 3D detector and projector for precision measurement
- Spectrometer for material composition analysis
Production Capabilities
- Supply Capacity: 1000 tons per month
- Minimum Order Quantity: Customizable per customer requirements
- Manufacturing Methods: Hot forging and cold upsetting processes
- Thread Production: Hot rolling with specialized threading machines
- Custom Manufacturing: Available based on customer drawings or samples
Company Advantages
- 20+ years of fastener industry experience
- Professional engineering team with 60+ engineers
- One-stop shopping for all railway fastening needs
- Competitive pricing with timely delivery
- Technical support and material test reports provided
- Strategic port location for efficient shipping services
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Maanshan Kingrail Technology Co.,Ltd.
Location
Building 1, Cross-border E-commerce Industrial Park, Comprehensive Bonded Zone, Zhengpugang New District, Ma’anshan City, Anhui Province
Contact Person
Amanda