China-Made Galvanized U-Bolts – 40/50/60mm Inner Width | Anti-Loosening Double Nut Design

FOB Price | 1,000 pieces (Min. Order)
Custom specifications and OEM service available
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Product Description
High-quality Galvanized U-Bolts, available in 40mm / 50mm / 60mm inner widths (1.57″ / 1.97″ / 2.36″), designed for securing round or square tube frames. Each set includes double hex or nylon lock nuts for anti-loosening performance and a washer slot for enhanced grip. Made from steel or stainless steel with a hot-dip galvanized finish, these products are corrosion-resistant and ideal for solar mounting systems, fences, trailers, and pipe support structures. Galvanized U-Bolts are perfect for general industrial use, while Stainless Steel U-Bolts are recommended for marine and high-humidity environments. Direct supply from China factory ensures competitive price and stable quality for bulk orders.
Product Images


Product Specifications
Parameter | Details |
---|---|
Product Name | Galvanized U-Bolt / Stainless Steel U-Bolt |
Material | Steel or Stainless Steel, with durable hot-dip galvanized coating |
U-Bolt Inner Width | 40mm / 50mm / 60mm (1.57″ / 1.97″ / 2.36″) – fits round and square tubes |
Matching Nuts | Includes double hex nuts or nylon lock nuts for anti-loosening |
Application Point | Used to secure round or square tube frames in construction, solar mounting, fencing, and machinery |
Anti-Slip Design | Bottom washer slot provides enhanced grip and prevents slipping |
Mounting Style | Through-hole mounting for stable and easy installation |
Features | Threaded design with locking nuts, corrosion-resistant, heavy-duty load capacity |
Applications
Galvanized and stainless steel U-bolts are widely used for securing round or square tubing in various structural and industrial applications. Commonly applied in solar panel mounting systems, fencing, vehicle chassis, pipe supports, and metal frame assemblies, they provide a reliable clamping solution for heavy-duty use. The anti-slip washer slot and locking nuts ensure stability under vibration and load. Whether for indoor machinery or outdoor construction, our U-bolts offer long-lasting performance with excellent corrosion resistance.
Solar & Construction
Securing tubular or square PV mounts, cable trays, and conduit pipes in solar racking systems. Perfect for mounting solar panels to rail structures.
Industrial Equipment
Fastening pipes and frames in machinery, HVAC, and infrastructure projects. Provides secure mounting for industrial applications.
Utility Installations
Used in telecom towers, fencing, and outdoor structural supports. Ideal for securing equipment in utility applications.
Commercial Solar
Perfect for commercial rooftop and ground-mounted solar installations. Offers reliable pipe and rail fastening.
Residential Solar
Ideal for residential rooftop solar systems. Provides secure mounting for home solar installations.
Infrastructure Projects
Designed for large-scale infrastructure projects with extensive pipe and rail systems. Ensures long-term structural integrity.

Certifications
Our products meet international quality standards and certifications:
- ISO 9001:2015 Quality Management System
- ISO 14001:2015 Environmental Management
- DIN 934 / ISO 4032 Standards Compliance
- ANSI B18.2.2 American Standards
- Third-party testing and certification

Packaging
Professional packaging solutions for safe transportation:
- 25kg cartons with inner plastic bags
- Custom branded packaging available
- Barcode and QR code labeling
- Moisture-proof and anti-corrosion protection
- Stackable design for efficient storage
Company Introduction
Welcome to Hebei Zixian Fasteners Co., Ltd. – Your Reliable Manufacturer of Galvanized Fasteners and Solar Mounting Accessories from China!
What we offer:
- Full in-house production – from raw materials to packaging
- Solar mid clamps, end clamps, brackets, galvanized bolts & nuts
- ISO-compliant quality control
- Competitive pricing & fast delivery
- OEM & custom fastener solutions for B2B buyers
Contact us today for product catalogs, samples, or quotes:
- Website: zixiansolarparts.com
- Email: xzi675763@gmail.com
- WhatsApp: +86 15630389170
Frequently Asked Questions
1. What sizes of galvanized U-bolts are available for tube mounting?
We offer galvanized U-bolts in inner widths of 40mm, 50mm, and 60mm (1.57″, 1.97″, and 2.36″), suitable for securing both round and square tubing in structural applications.
2. Are your U-bolts hot-dip galvanized or electro-galvanized?
Our U-bolts are hot-dip galvanized, providing superior corrosion resistance for outdoor and industrial environments compared to electro-galvanized alternatives.
3. What’s the difference between galvanized U-bolts and stainless steel U-bolts?
Galvanized U-bolts are cost-effective and ideal for general use, while stainless steel U-bolts are recommended for marine, coastal, or high-humidity applications due to their rust-proof properties.
4. Can I buy U-bolts directly from your China factory?
Yes, we are a China-based U-bolt manufacturer offering factory-direct supply, competitive pricing, and bulk order support for global customers.
5. Do the U-bolts include nuts and washers?
Yes. Each U-bolt comes with double hex nuts or nylon lock nuts, and features an anti-slip washer slot for extra stability during mounting.
6. What industries commonly use your U-bolts?
Our U-bolts are widely used in solar panel racking systems, pipe supports, fencing, automotive frames, and industrial machinery.
Get in Touch
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Why Choose Us?
- ✓ 1-on-1 Expert Support – Custom solutions for your specific needs
- ✓ Factory Tours Available – Verify our quality standards in person
- ✓ Global Supply Experience – Trusted by clients in 15+ countries