Grade 5.8 & 8.8 Black Square Head Lag Bolts for Track Fishtail Applications - M6 to M125 Diameter Range
Price:
Negotiable
MOQ:
Negotiable
Delivery Time:
5-8 work days
Brand:
Kingrail
Product Description
Product Overview
Grade 5.8 and 8.8 black square head lag bolts designed specifically for track fishtail applications. These heavy-duty fasteners feature hot-dip galvanized coating for superior corrosion resistance and are available in customized sizes to meet specific project requirements.
Applications
Primarily used in track laying operations across metallurgical, coking, and steel industries. These fishtail bolts securely connect and fasten rail joints in railway systems, ensuring structural integrity and operational safety.
Technical Specifications
Available Models
Φ14×70 mm
Φ16×75 mm
Φ18×90 mm
Φ20×90 mm
Φ22×135 mm
Φ24×135 mm, Φ24×145 mm, Φ24×170 mm
Material Options
Q235 steel, 45# steel, carbon steel, alloy steel, stainless steel, brass, and insulated fishtail bolt variants.
Performance Grades
Available in multiple strength classes including 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9, and 12.9. Grade 8.8 bolts provide nominal tensile strength of 800 N/mm² and yield strength of 640 N/mm².
Manufacturing Standards
| Standard | ASME B18.10, DIN 5903, ASTM A193, ASTM A320 |
|---|---|
| Diameter Range | 1/4"-5", M6-M125 |
| Length Range | Up to 9 meters (30 feet) |
| Thread Types | M, UNC, UNF, UNS, UNR |
| Surface Finishes | Plain, Zinc Plated (Clear/Blue/Yellow/Black), Hot-Dip Galvanized, PTFE, Zinc Nickel |
Quality Assurance
All manufacturing processes comply with ISO9001-2008 quality management system. We maintain comprehensive testing equipment including calipers, tensile test machines, hardness testers, and spectrometers to ensure all products meet specified requirements and industry standards.
Production Capabilities
Supply capacity: 1000 tons per month
Minimum order quantity: Customized according to customer demand
15+ years of fastener industry experience
Professional engineering support team
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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